{
  "dataset": "dimmath_monthly_carrier_benchmarks",
  "issue_id": "2026-09",
  "verified_date": "2026-09-12",
  "methodology_version": "2026-Q3.1-benchmark-1",
  "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
  "license": "Free to use commercially with attribution to https://dimmath.com/data/",
  "disclaimer": "Benchmark estimates from DimMath verified config (USPS Notice 123 Ground Advantage and Cubic; UPS Daily DIM 139; published UPS residential surcharge). UPS and FedEx dollar rates may be modeled estimates when no shipping_rates row is present. Not live carrier quotes and not negotiated account rates.",
  "total_rows": 36,
  "rows": [
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 13.11,
      "fedex_estimate": 12.18,
      "usps_ga_estimate": 7.68,
      "usps_cubic_estimate_or_null": 7.51,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.17,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 6.51,
      "fedex_estimate": 5.73,
      "usps_ga_estimate": 7.68,
      "usps_cubic_estimate_or_null": 7.51,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 0.78,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 15.75,
      "fedex_estimate": 14.5,
      "usps_ga_estimate": 8.74,
      "usps_cubic_estimate_or_null": 8.49,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.25,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 9.15,
      "fedex_estimate": 8.05,
      "usps_ga_estimate": 8.74,
      "usps_cubic_estimate_or_null": 8.49,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "USPS Cubic",
      "spread": 0.44,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 19.46,
      "fedex_estimate": 17.76,
      "usps_ga_estimate": 10.67,
      "usps_cubic_estimate_or_null": 10.13,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.54,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Light mailer",
      "length_in": 10,
      "width_in": 7,
      "height_in": 1,
      "actual_weight_lb": 0.75,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 12.86,
      "fedex_estimate": 11.31,
      "usps_ga_estimate": 10.67,
      "usps_cubic_estimate_or_null": 10.13,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.54,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 13.58,
      "fedex_estimate": 12.57,
      "usps_ga_estimate": 7.68,
      "usps_cubic_estimate_or_null": 7.89,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 0.21,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 6.98,
      "fedex_estimate": 6.12,
      "usps_ga_estimate": 7.68,
      "usps_cubic_estimate_or_null": 7.89,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 0.86,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 16.4,
      "fedex_estimate": 15.05,
      "usps_ga_estimate": 8.74,
      "usps_cubic_estimate_or_null": 9.37,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 0.63,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 9.8,
      "fedex_estimate": 8.6,
      "usps_ga_estimate": 8.74,
      "usps_cubic_estimate_or_null": 9.37,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.14,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 20.37,
      "fedex_estimate": 18.53,
      "usps_ga_estimate": 10.67,
      "usps_cubic_estimate_or_null": 11.84,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 1.17,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Small box",
      "length_in": 9,
      "width_in": 6,
      "height_in": 4,
      "actual_weight_lb": 1,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 13.77,
      "fedex_estimate": 12.08,
      "usps_ga_estimate": 10.67,
      "usps_cubic_estimate_or_null": 11.84,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 1.17,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 14.96,
      "fedex_estimate": 13.75,
      "usps_ga_estimate": 9.76,
      "usps_cubic_estimate_or_null": 8.45,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 1.31,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 8.36,
      "fedex_estimate": 7.3,
      "usps_ga_estimate": 9.76,
      "usps_cubic_estimate_or_null": 8.45,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 1.06,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 18.35,
      "fedex_estimate": 16.7,
      "usps_ga_estimate": 13.48,
      "usps_cubic_estimate_or_null": 10.96,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 2.52,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 11.75,
      "fedex_estimate": 10.25,
      "usps_ga_estimate": 13.48,
      "usps_cubic_estimate_or_null": 10.96,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "USPS Cubic",
      "spread": 0.71,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 23.11,
      "fedex_estimate": 20.85,
      "usps_ga_estimate": 19.19,
      "usps_cubic_estimate_or_null": 14.67,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "USPS Cubic",
      "runner_up": "USPS Ground Advantage",
      "spread": 4.52,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Dense cubic candidate",
      "length_in": 10,
      "width_in": 8,
      "height_in": 6,
      "actual_weight_lb": 5,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 16.51,
      "fedex_estimate": 14.4,
      "usps_ga_estimate": 19.19,
      "usps_cubic_estimate_or_null": 14.67,
      "cubic_eligible": true,
      "dim_applies": false,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "USPS Cubic",
      "spread": 0.27,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 16.81,
      "fedex_estimate": 15.31,
      "usps_ga_estimate": 8.66,
      "usps_cubic_estimate_or_null": 10,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 1.34,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 10.21,
      "fedex_estimate": 8.86,
      "usps_ga_estimate": 8.66,
      "usps_cubic_estimate_or_null": 10,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "FedEx Ground",
      "spread": 0.2,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 20.95,
      "fedex_estimate": 18.9,
      "usps_ga_estimate": 11.57,
      "usps_cubic_estimate_or_null": 14.76,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 3.19,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 14.35,
      "fedex_estimate": 12.45,
      "usps_ga_estimate": 11.57,
      "usps_cubic_estimate_or_null": 14.76,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "FedEx Ground",
      "spread": 0.88,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 26.76,
      "fedex_estimate": 23.94,
      "usps_ga_estimate": 15.75,
      "usps_cubic_estimate_or_null": 21.57,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "USPS Cubic",
      "spread": 5.82,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Shoebox profile",
      "length_in": 14,
      "width_in": 10,
      "height_in": 8,
      "actual_weight_lb": 3,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 20.16,
      "fedex_estimate": 17.49,
      "usps_ga_estimate": 15.75,
      "usps_cubic_estimate_or_null": 21.57,
      "cubic_eligible": true,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "FedEx Ground",
      "spread": 1.74,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path. USPS Ground Advantage Cubic eligible under DMM 283 / Notice 123 (max 22 in / 20 lb / 1.0 ft³)."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 22.83,
      "fedex_estimate": 20.4,
      "usps_ga_estimate": 21.22,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "USPS Ground Advantage",
      "spread": 0.82,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 16.23,
      "fedex_estimate": 13.95,
      "usps_ga_estimate": 21.22,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 2.28,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 29.4,
      "fedex_estimate": 26.05,
      "usps_ga_estimate": 29.45,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 3.35,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 22.8,
      "fedex_estimate": 19.6,
      "usps_ga_estimate": 29.45,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 3.2,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 38.63,
      "fedex_estimate": 33.99,
      "usps_ga_estimate": 49.74,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 4.64,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "DIM-risk carton",
      "length_in": 18,
      "width_in": 14,
      "height_in": 12,
      "actual_weight_lb": 8,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 32.03,
      "fedex_estimate": 27.54,
      "usps_ga_estimate": 49.74,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 4.49,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 2,
      "address_type": "residential",
      "ups_estimate": 21.9,
      "fedex_estimate": 19.62,
      "usps_ga_estimate": 17.06,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "FedEx Ground",
      "spread": 2.56,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 2,
      "address_type": "business",
      "ups_estimate": 15.3,
      "fedex_estimate": 13.17,
      "usps_ga_estimate": 17.06,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 2.13,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 5,
      "address_type": "residential",
      "ups_estimate": 28.1,
      "fedex_estimate": 24.95,
      "usps_ga_estimate": 24.93,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "USPS Ground Advantage",
      "runner_up": "FedEx Ground",
      "spread": 0.02,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 5,
      "address_type": "business",
      "ups_estimate": 21.5,
      "fedex_estimate": 18.5,
      "usps_ga_estimate": 24.93,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 3,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 8,
      "address_type": "residential",
      "ups_estimate": 36.81,
      "fedex_estimate": 32.44,
      "usps_ga_estimate": 40.39,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 4.37,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Residential surcharge added: UPS $6.60 (published); FedEx $6.45 (DimMath 2026 article context, not a live quote). USPS has no residential surcharge. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    },
    {
      "issue_id": "2026-09",
      "month_label": "September 2026",
      "scenario_name": "Heavy parcel",
      "length_in": 16,
      "width_in": 12,
      "height_in": 10,
      "actual_weight_lb": 20,
      "zone": 8,
      "address_type": "business",
      "ups_estimate": 30.21,
      "fedex_estimate": 25.99,
      "usps_ga_estimate": 40.39,
      "usps_cubic_estimate_or_null": null,
      "cubic_eligible": false,
      "dim_applies": true,
      "surcharge_flag": "none",
      "winner": "FedEx Ground",
      "runner_up": "UPS Ground",
      "spread": 4.22,
      "methodology_version": "2026-Q3.1-benchmark-1",
      "verified_date": "2026-09-12",
      "source_snapshot_label": "Version 2026-Q3.1 (12 Sept. 2026 snapshot)",
      "notes": "UPS dollar cell is a DimMath modeled estimate, not a live quote. FedEx dollar cell is a DimMath modeled estimate, not independently verified from a 2026 FedEx Rate Guide PDF. Business address: no residential surcharge applied. DIM billable weight exceeds actual weight on at least one private-carrier or USPS DIM path."
    }
  ]
}