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FA-95391 / Shipping rate zone lookup / Open access

Billable weight: cube from raw measurements · case 01

Dimensional weight is computed from unrounded measurements and disagrees with audited invoices.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Dimensions are never rounded before the cube is computed.

VERIFIED REPAIR

Round each dimension first, then multiply.

Unsuccessful approach: Truncating dimensions under-measures sides at or above the half inch.

Case contract

dims inches (each rounded half up to a whole inch), actual lb rounded up (minimum 1). Dim weight = ceil(L*W*H/divisor) using rounded dims, only when the rounded cube exceeds 1728 cubic inches. Return [billable, "DIM"] if dim weight strictly exceeds rounded actual, else [actual, "ACTUAL"].

Why this case matters

Carriers bill the greater of actual and dimensional weight before zone rating.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(dims, actual, divisor):
    r = list(dims)
    cube = r[0] * r[1] * r[2]
    act = max(1, math.ceil(actual))
    dimw = -(-cube // divisor) if cube > 1728 else 0
    if dimw > act:
        return [dimw, 'DIM']
    return [act, 'ACTUAL']
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['generated mix 1', [[13.5, 13.5, 10], 1, 166], [12, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']]], [['generated mix 11', [[13.5, 24.5, 10.5], 0.2, 139], [28, 'DIM']], ['generated mix 10', [[12.5, 12, 16], 1, 139], [18, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['generated mix 27', [[10.5, 12.5, 24.5], 1, 139], [26, 'DIM']]], [['generated mix 29', [[12, 10, 24.5], 0.2, 166], [19, 'DIM']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 21', [[12.5, 20, 10], 30, 166], [30, 'ACTUAL']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']]], [['generated mix 42', [[10.5, 18.5, 13.5], 1, 139], [22, 'DIM']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 32', [[12, 12, 18.5], 7.5, 166], [17, 'DIM']], ['generated mix 40', [[24.5, 20, 18.5], 5, 139], [69, 'DIM']], ['generated mix 49', [[12, 12, 10.5], 7.5, 139], [8, 'ACTUAL']]], [['generated mix 58', [[12, 10.5, 18.5], 5, 166], [16, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 43', [[20, 10.5, 24.5], 7.5, 139], [40, 'DIM']], ['generated mix 51', [[10, 11.4, 18.5], 2.1, 139], [16, 'DIM']], ['generated mix 60', [[18.5, 11.4, 18.5], 14, 139], [29, 'DIM']]]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
half inch rounds up[13.0, 'DIM'][14, 'DIM']Failed
generated mix 1[11.0, 'DIM'][12, 'DIM']Failed
cube threshold exact[1, 'ACTUAL'][1, 'ACTUAL']Passed
actual fraction up[8, 'ACTUAL'][8, 'ACTUAL']Passed
dim ceil[14, 'DIM'][14, 'DIM']Passed
just above threshold[12, 'DIM'][12, 'DIM']Passed
tie goes actual[58, 'ACTUAL'][58, 'ACTUAL']Passed
generated mix 9[30, 'ACTUAL'][30, 'ACTUAL']Passed

SHA-256 / 334d27194433315b5de1f51a96cfc58493f6df9e09415f041c7483061fd4ae69

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(dims, actual, divisor):
    r = [int(d) for d in dims]
    cube = r[0] * r[1] * r[2]
    act = max(1, math.ceil(actual))
    dimw = -(-cube // divisor) if cube > 1728 else 0
    if dimw > act:
        return [dimw, 'DIM']
    return [act, 'ACTUAL']
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['generated mix 1', [[13.5, 13.5, 10], 1, 166], [12, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']]], [['generated mix 11', [[13.5, 24.5, 10.5], 0.2, 139], [28, 'DIM']], ['generated mix 10', [[12.5, 12, 16], 1, 139], [18, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['generated mix 27', [[10.5, 12.5, 24.5], 1, 139], [26, 'DIM']]], [['generated mix 29', [[12, 10, 24.5], 0.2, 166], [19, 'DIM']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 21', [[12.5, 20, 10], 30, 166], [30, 'ACTUAL']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']]], [['generated mix 42', [[10.5, 18.5, 13.5], 1, 139], [22, 'DIM']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 32', [[12, 12, 18.5], 7.5, 166], [17, 'DIM']], ['generated mix 40', [[24.5, 20, 18.5], 5, 139], [69, 'DIM']], ['generated mix 49', [[12, 12, 10.5], 7.5, 139], [8, 'ACTUAL']]], [['generated mix 58', [[12, 10.5, 18.5], 5, 166], [16, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 43', [[20, 10.5, 24.5], 7.5, 139], [40, 'DIM']], ['generated mix 51', [[10, 11.4, 18.5], 2.1, 139], [16, 'DIM']], ['generated mix 60', [[18.5, 11.4, 18.5], 14, 139], [29, 'DIM']]]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
half inch rounds up[5, 'ACTUAL'][14, 'DIM']Failed
generated mix 1[1, 'ACTUAL'][12, 'DIM']Failed
cube threshold exact[1, 'ACTUAL'][1, 'ACTUAL']Passed
actual fraction up[8, 'ACTUAL'][8, 'ACTUAL']Passed
dim ceil[14, 'DIM'][14, 'DIM']Passed
just above threshold[12, 'DIM'][12, 'DIM']Passed
tie goes actual[58, 'ACTUAL'][58, 'ACTUAL']Passed
generated mix 9[30, 'ACTUAL'][30, 'ACTUAL']Passed

SHA-256 / bc752ec9cf19b8ef4fb59d3f87aea0dc0f5c461ccf42a7302a709257b3e96e90

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(dims, actual, divisor):
    r = [int(math.floor(d + 0.5)) for d in dims]
    cube = r[0] * r[1] * r[2]
    act = max(1, math.ceil(actual))
    dimw = -(-cube // divisor) if cube > 1728 else 0
    if dimw > act:
        return [dimw, 'DIM']
    return [act, 'ACTUAL']
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['generated mix 1', [[13.5, 13.5, 10], 1, 166], [12, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']]], [['generated mix 11', [[13.5, 24.5, 10.5], 0.2, 139], [28, 'DIM']], ['generated mix 10', [[12.5, 12, 16], 1, 139], [18, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 9', [[12, 12, 13.5], 30, 139], [30, 'ACTUAL']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['generated mix 27', [[10.5, 12.5, 24.5], 1, 139], [26, 'DIM']]], [['generated mix 29', [[12, 10, 24.5], 0.2, 166], [19, 'DIM']], ['generated mix 19', [[24.5, 20, 16], 7.5, 139], [58, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 21', [[12.5, 20, 10], 30, 166], [30, 'ACTUAL']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']]], [['generated mix 42', [[10.5, 18.5, 13.5], 1, 139], [22, 'DIM']], ['generated mix 30', [[13.5, 18.5, 12], 5, 139], [23, 'DIM']], ['actual fraction up', [[10, 10, 10], 7.2, 139], [8, 'ACTUAL']], ['dim ceil', [[18, 12, 10], 1, 166], [14, 'DIM']], ['cube threshold exact', [[12, 12, 12], 1, 139], [1, 'ACTUAL']], ['generated mix 32', [[12, 12, 18.5], 7.5, 166], [17, 'DIM']], ['generated mix 40', [[24.5, 20, 18.5], 5, 139], [69, 'DIM']], ['generated mix 49', [[12, 12, 10.5], 7.5, 139], [8, 'ACTUAL']]], [['generated mix 58', [[12, 10.5, 18.5], 5, 166], [16, 'DIM']], ['generated mix 38', [[24.5, 11.4, 10.5], 9, 139], [22, 'DIM']], ['half inch rounds up', [[12.5, 12, 12], 5, 139], [14, 'DIM']], ['just above threshold', [[12, 12, 13], 1, 166], [12, 'DIM']], ['tie goes actual', [[20, 20, 20], 58, 139], [58, 'ACTUAL']], ['generated mix 43', [[20, 10.5, 24.5], 7.5, 139], [40, 'DIM']], ['generated mix 51', [[10, 11.4, 18.5], 2.1, 139], [16, 'DIM']], ['generated mix 60', [[18.5, 11.4, 18.5], 14, 139], [29, 'DIM']]]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
half inch rounds up[14, 'DIM'][14, 'DIM']Passed
generated mix 1[12, 'DIM'][12, 'DIM']Passed
cube threshold exact[1, 'ACTUAL'][1, 'ACTUAL']Passed
actual fraction up[8, 'ACTUAL'][8, 'ACTUAL']Passed
dim ceil[14, 'DIM'][14, 'DIM']Passed
just above threshold[12, 'DIM'][12, 'DIM']Passed
tie goes actual[58, 'ACTUAL'][58, 'ACTUAL']Passed
generated mix 9[30, 'ACTUAL'][30, 'ACTUAL']Passed

SHA-256 / 3eaba89b5401039671585a53fc153088fb264d8d6db396de6b9bd573b7344640

Verification & scope

Stipulated divisor and threshold; no carrier specific exceptions. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:52:13.245000+00:00.

Case digest / 963f54af5edc9fb6f3eb6e2531bccd2aa85312bd220195d0f3bbc3cc9598a1c9