Understand the failure.
Verify the repair.
Small, reproducible software failures. The broken implementation, the fix that didn’t work, and the one that passed—preserved together.
Explore the cases ↓How results are verified ↗WHAT THE ARCHIVE CONTAINS
100840 executable cases. 20168 are open.
Every case records the implementation that fails, the fix that did not work, and the repair that passed its checks—with recorded outputs and source hashes. This release adds 100840 cases across 20168 failure mechanisms and 254 domains.
The open tier gives you the failure and the unsuccessful fix for one case in every mechanism. The remaining 80672 cases, 5 variants per mechanism, are member-only: the verified repair, its recorded checks, and the full fixture suite are held in the member archive. Read the methodology ↗
A RECORD OF WHAT WENT WRONG
Browse the archive / 100840
Face sizing: split slot count floored · case 01
Items that need several slots are given one slot too few.
Face sizing: split slot count floored · case 02
Items that need several slots are given one slot too few.
Face sizing: split slot count floored · case 03
Items that need several slots are given one slot too few.
Face sizing: split slot count floored · case 04
Items that need several slots are given one slot too few.
Face sizing: split slot count floored · case 05
Items that need several slots are given one slot too few.
Face sizing: overflow split over smallest slots · case 01
High-demand items are spread across many small shelf slots.
Face sizing: overflow split over smallest slots · case 02
High-demand items are spread across many small shelf slots.
Face sizing: overflow split over smallest slots · case 03
High-demand items are spread across many small shelf slots.
Face sizing: overflow split over smallest slots · case 04
High-demand items are spread across many small shelf slots.
Face sizing: overflow split over smallest slots · case 05
High-demand items are spread across many small shelf slots.
Honeycombing: extra lane on exact multiples · case 01
SKUs whose pallet count fills lanes exactly are charged an extra empty lane.
Honeycombing: extra lane on exact multiples · case 02
SKUs whose pallet count fills lanes exactly are charged an extra empty lane.
Honeycombing: extra lane on exact multiples · case 03
SKUs whose pallet count fills lanes exactly are charged an extra empty lane.
Honeycombing: extra lane on exact multiples · case 04
SKUs whose pallet count fills lanes exactly are charged an extra empty lane.
Honeycombing: extra lane on exact multiples · case 05
SKUs whose pallet count fills lanes exactly are charged an extra empty lane.
Honeycombing: full lanes reported as a lost lane · case 01
A SKU that fills its lanes exactly shows a full lane of honeycomb loss.
Honeycombing: full lanes reported as a lost lane · case 02
A SKU that fills its lanes exactly shows a full lane of honeycomb loss.
Honeycombing: full lanes reported as a lost lane · case 03
A SKU that fills its lanes exactly shows a full lane of honeycomb loss.
Honeycombing: full lanes reported as a lost lane · case 04
A SKU that fills its lanes exactly shows a full lane of honeycomb loss.
Honeycombing: full lanes reported as a lost lane · case 05
A SKU that fills its lanes exactly shows a full lane of honeycomb loss.
Honeycombing: later line replaces SKU total · case 01
Adjustment lines replace the SKU quantity instead of netting against it.
Honeycombing: later line replaces SKU total · case 02
Adjustment lines replace the SKU quantity instead of netting against it.
Honeycombing: later line replaces SKU total · case 03
Adjustment lines replace the SKU quantity instead of netting against it.
Honeycombing: later line replaces SKU total · case 04
Adjustment lines replace the SKU quantity instead of netting against it.
Honeycombing: later line replaces SKU total · case 05
Adjustment lines replace the SKU quantity instead of netting against it.
Honeycombing: full use of lanes flagged over · case 01
Using exactly the available lanes is reported as over capacity.
Honeycombing: full use of lanes flagged over · case 02
Using exactly the available lanes is reported as over capacity.
Honeycombing: full use of lanes flagged over · case 03
Using exactly the available lanes is reported as over capacity.
Honeycombing: full use of lanes flagged over · case 04
Using exactly the available lanes is reported as over capacity.
Honeycombing: full use of lanes flagged over · case 05
Using exactly the available lanes is reported as over capacity.
Honeycombing: utilization rounded to nearest · case 01
Lane utilization is reported one basis point high on repeating fractions.
Honeycombing: utilization rounded to nearest · case 02
Lane utilization is reported one basis point high on repeating fractions.
Honeycombing: utilization rounded to nearest · case 03
Lane utilization is reported one basis point high on repeating fractions.
Honeycombing: utilization rounded to nearest · case 04
Lane utilization is reported one basis point high on repeating fractions.
Honeycombing: utilization rounded to nearest · case 05
Lane utilization is reported one basis point high on repeating fractions.
Honeycombing: negative net quantity sized · case 01
A SKU whose adjustments net below zero produces phantom loss.
Honeycombing: negative net quantity sized · case 02
A SKU whose adjustments net below zero produces phantom loss.
Honeycombing: negative net quantity sized · case 03
A SKU whose adjustments net below zero produces phantom loss.
Honeycombing: negative net quantity sized · case 04
A SKU whose adjustments net below zero produces phantom loss.
Honeycombing: negative net quantity sized · case 05
A SKU whose adjustments net below zero produces phantom loss.
Zone chart: ZIP+4 destinations rejected · case 01
Addresses carrying a ZIP+4 extension are rated as invalid and fall out of automated shipping.
Zone chart: ZIP+4 destinations rejected · case 02
Addresses carrying a ZIP+4 extension are rated as invalid and fall out of automated shipping.
Zone chart: ZIP+4 destinations rejected · case 03
Addresses carrying a ZIP+4 extension are rated as invalid and fall out of automated shipping.
Zone chart: ZIP+4 destinations rejected · case 04
Addresses carrying a ZIP+4 extension are rated as invalid and fall out of automated shipping.
Zone chart: ZIP+4 destinations rejected · case 05
Addresses carrying a ZIP+4 extension are rated as invalid and fall out of automated shipping.
Zone chart: four-digit New England ZIPs invalid · case 01
ZIPs that lost their leading zero in a spreadsheet export are rejected.
Zone chart: four-digit New England ZIPs invalid · case 02
ZIPs that lost their leading zero in a spreadsheet export are rejected.
Zone chart: four-digit New England ZIPs invalid · case 03
ZIPs that lost their leading zero in a spreadsheet export are rejected.
Zone chart: four-digit New England ZIPs invalid · case 04
ZIPs that lost their leading zero in a spreadsheet export are rejected.
Zone chart: four-digit New England ZIPs invalid · case 05
ZIPs that lost their leading zero in a spreadsheet export are rejected.
Zone chart: last ZIP3 of a range unmatched · case 01
Destinations on the last ZIP3 of a chart row fall to a wider row or NO_ZONE.
Zone chart: last ZIP3 of a range unmatched · case 02
Destinations on the last ZIP3 of a chart row fall to a wider row or NO_ZONE.
Zone chart: last ZIP3 of a range unmatched · case 03
Destinations on the last ZIP3 of a chart row fall to a wider row or NO_ZONE.
Zone chart: last ZIP3 of a range unmatched · case 04
Destinations on the last ZIP3 of a chart row fall to a wider row or NO_ZONE.
Zone chart: last ZIP3 of a range unmatched · case 05
Destinations on the last ZIP3 of a chart row fall to a wider row or NO_ZONE.
Zone chart: broad row shadows exception row · case 01
A ZIP3 carved out as an exception row is rated with the broad surrounding row.
Zone chart: broad row shadows exception row · case 02
A ZIP3 carved out as an exception row is rated with the broad surrounding row.
Zone chart: broad row shadows exception row · case 03
A ZIP3 carved out as an exception row is rated with the broad surrounding row.
Zone chart: broad row shadows exception row · case 04
A ZIP3 carved out as an exception row is rated with the broad surrounding row.
Zone chart: broad row shadows exception row · case 05
A ZIP3 carved out as an exception row is rated with the broad surrounding row.
Zone chart: later row wins equal-width overlap · case 01
When two equally narrow rows overlap, the later row overrides the earlier one.
Zone chart: later row wins equal-width overlap · case 02
When two equally narrow rows overlap, the later row overrides the earlier one.
Zone chart: later row wins equal-width overlap · case 03
When two equally narrow rows overlap, the later row overrides the earlier one.
Zone chart: later row wins equal-width overlap · case 04
When two equally narrow rows overlap, the later row overrides the earlier one.
Zone chart: later row wins equal-width overlap · case 05
When two equally narrow rows overlap, the later row overrides the earlier one.
Zone chart: garbage after ZIP3 accepted · case 01
Codes like "123AB" are rated as if they were valid ZIPs.
Zone chart: garbage after ZIP3 accepted · case 02
Codes like "123AB" are rated as if they were valid ZIPs.
Zone chart: garbage after ZIP3 accepted · case 03
Codes like "123AB" are rated as if they were valid ZIPs.
Zone chart: garbage after ZIP3 accepted · case 04
Codes like "123AB" are rated as if they were valid ZIPs.
Zone chart: garbage after ZIP3 accepted · case 05
Codes like "123AB" are rated as if they were valid ZIPs.
Billable weight: half inches rounded to even · case 01
A 12.5 inch side is measured as 12 inches, under-billing dimensional weight.
Billable weight: half inches rounded to even · case 02
A 12.5 inch side is measured as 12 inches, under-billing dimensional weight.
Billable weight: half inches rounded to even · case 03
A 12.5 inch side is measured as 12 inches, under-billing dimensional weight.
Billable weight: half inches rounded to even · case 04
A 12.5 inch side is measured as 12 inches, under-billing dimensional weight.
Billable weight: half inches rounded to even · case 05
A 12.5 inch side is measured as 12 inches, under-billing dimensional weight.
Billable weight: dim weight truncated · case 01
Dimensional weight is a pound short whenever cube is not an exact multiple of the divisor.
Billable weight: dim weight truncated · case 02
Dimensional weight is a pound short whenever cube is not an exact multiple of the divisor.
Billable weight: dim weight truncated · case 03
Dimensional weight is a pound short whenever cube is not an exact multiple of the divisor.
Billable weight: dim weight truncated · case 04
Dimensional weight is a pound short whenever cube is not an exact multiple of the divisor.
Billable weight: dim weight truncated · case 05
Dimensional weight is a pound short whenever cube is not an exact multiple of the divisor.
Billable weight: one cubic foot parcels dim-rated · case 01
A parcel of exactly one cubic foot is charged dimensional weight.
Billable weight: one cubic foot parcels dim-rated · case 02
A parcel of exactly one cubic foot is charged dimensional weight.
Billable weight: one cubic foot parcels dim-rated · case 03
A parcel of exactly one cubic foot is charged dimensional weight.
Billable weight: one cubic foot parcels dim-rated · case 04
A parcel of exactly one cubic foot is charged dimensional weight.
Billable weight: one cubic foot parcels dim-rated · case 05
A parcel of exactly one cubic foot is charged dimensional weight.
Billable weight: actual weight rounded to nearest · case 01
A 7.2 lb parcel is billed at 7 lb.
Billable weight: actual weight rounded to nearest · case 02
A 7.2 lb parcel is billed at 7 lb.
Billable weight: actual weight rounded to nearest · case 03
A 7.2 lb parcel is billed at 7 lb.
Billable weight: actual weight rounded to nearest · case 04
A 7.2 lb parcel is billed at 7 lb.
Billable weight: actual weight rounded to nearest · case 05
A 7.2 lb parcel is billed at 7 lb.
Billable weight: cube from raw measurements · case 01
Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.
Billable weight: cube from raw measurements · case 02
Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.
Billable weight: cube from raw measurements · case 03
Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.
Billable weight: cube from raw measurements · case 04
Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.
Billable weight: cube from raw measurements · case 05
Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.
Billable weight: tie labelled dimensional · case 01
Parcels whose dim weight equals actual weight are labelled DIM, triggering dim audits.
Billable weight: tie labelled dimensional · case 02
Parcels whose dim weight equals actual weight are labelled DIM, triggering dim audits.
Billable weight: tie labelled dimensional · case 03
Parcels whose dim weight equals actual weight are labelled DIM, triggering dim audits.
Billable weight: tie labelled dimensional · case 04
Parcels whose dim weight equals actual weight are labelled DIM, triggering dim audits.
Billable weight: tie labelled dimensional · case 05
Parcels whose dim weight equals actual weight are labelled DIM, triggering dim audits.
INSPECTABLE BY DESIGN
Every result has a runnable source.
Runnable implementations with recorded outputs, source hashes, and explicit contracts. Related variants share a failure mechanism and belong together in evaluation splits.
Read the methodology ↗