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FA-94881 / Warehouse slotting and bin packing / Open access

Golden zone: equal-score slots ignore level · case 01

Among slots with the same ergonomic score, a higher level is picked over a lower one when its id sorts first.

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

ROOT CAUSE

The slot preference drops the level tie-break and orders equal scores only by slot id.

THE FAILURE

The slot preference drops the level tie-break and orders equal scores only by slot id.

Unsuccessful approach: Sorting level descending among equal scores prefers the highest reach, the opposite of the rule.

Case contract

skus [[sku, weekly_picks, kg]], slots [[slot, level 1-5, ergonomic_score]]. Process SKUs by picks desc then sku. Each takes the best free eligible slot by score desc, level asc, slot id. Items over 20 kg may not be above level 2. Slots scoring 8+ are reserved for SKUs with at least 50 picks. No eligible slot -> None. Return [[sku, slot]] sorted by sku.

Why this case matters

Forward pick slotting places the fastest movers in ergonomic golden-zone locations.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(skus, slots):
    order = sorted(skus, key=lambda r: (-r[1], r[0]))
    used = set()
    out = {}
    for sku, picks, kg in order:
        best = None
        for s in sorted(slots, key=lambda s: (-s[2], s[0])):
            sid, lvl, score = s
            if sid in used:
                continue
            if kg > 20 and lvl > 2:
                continue
            if score >= 8 and picks < 50:
                continue
            best = sid
            break
        if best is not None:
            used.add(best)
        out[sku] = best
    return [[k, out[k]] for k in sorted(out)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 1', [[['K0', 120, 21], ['K1', 49, 20], ['K2', 120, 15]], [['L0', 1, 3], ['L1', 4, 3], ['L2', 1, 9], ['L3', 2, 3]]], [['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 7', [[['K0', 51, 15], ['K1', 80, 30], ['K2', 10, 21]], [['L0', 1, 8], ['L1', 2, 3]]], [['K0', 'L1'], ['K1', 'L0'], ['K2', None]]], ['generated mix 15', [[['K0', 120, 21], ['K1', 0, 30], ['K2', 0, 21], ['K3', 80, 15], ['K4', 50, 2], ['K5', 80, 30]], [['L0', 5, 8], ['L1', 1, 3], ['L2', 3, 8], ['L3', 3, 6], ['L4', 2, 6], ['L5', 3, 10]]], [['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]]], [['generated mix 46', [[['K0', 80, 21], ['K1', 0, 15], ['K2', 80, 21]], [['L0', 2, 9], ['L1', 4, 3], ['L2', 3, 3], ['L3', 1, 9], ['L4', 2, 10]]], [['K0', 'L4'], ['K1', 'L2'], ['K2', 'L3']]], ['generated mix 23', [[['K0', 10, 15], ['K1', 80, 15], ['K2', 50, 2], ['K3', 51, 15], ['K4', 0, 21]], [['L0', 1, 6], ['L1', 3, 6], ['L2', 1, 9], ['L3', 3, 8]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', 'L0'], ['K3', 'L3'], ['K4', None]]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 9', [[['K0', 50, 20], ['K1', 50, 30], ['K2', 0, 21], ['K3', 10, 20], ['K4', 10, 20], ['K5', 51, 2]], [['L0', 3, 9], ['L1', 4, 6], ['L2', 2, 3]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', None], ['K3', None], ['K4', None], ['K5', 'L0']]], ['generated mix 17', [[['K0', 50, 30]], [['L0', 3, 3], ['L1', 2, 5], ['L2', 2, 10], ['L3', 2, 10], ['L4', 3, 10]]], [['K0', 'L2']]]], [['generated mix 65', [[['K0', 49, 2], ['K1', 80, 15], ['K2', 120, 30], ['K3', 10, 21]], [['L0', 4, 9], ['L1', 1, 9], ['L2', 4, 3], ['L3', 2, 6], ['L4', 2, 9], ['L5', 2, 5], ['L6', 3, 6]]], [['K0', 'L3'], ['K1', 'L4'], ['K2', 'L1'], ['K3', 'L5']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 20', [[['K0', 50, 15]], [['L0', 4, 3], ['L1', 3, 10], ['L2', 4, 8], ['L3', 5, 9]]], [['K0', 'L1']]], ['generated mix 28', [[['K0', 51, 20]], [['L0', 4, 5], ['L1', 4, 3], ['L2', 2, 8], ['L3', 2, 3], ['L4', 5, 6], ['L5', 5, 10]]], [['K0', 'L5']]]], [['generated mix 4', [[['K0', 120, 20], ['K1', 0, 30]], [['L0', 5, 3], ['L1', 5, 10], ['L2', 5, 10], ['L3', 2, 10], ['L4', 3, 3], ['L5', 1, 6], ['L6', 4, 3]]], [['K0', 'L3'], ['K1', 'L5']]], ['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 32', [[['K0', 51, 2], ['K1', 51, 21]], [['L0', 1, 3], ['L1', 5, 6], ['L2', 5, 10], ['L3', 2, 9], ['L4', 3, 8], ['L5', 5, 5]]], [['K0', 'L2'], ['K1', 'L3']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]]], [['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['generated mix 62', [[['K0', 49, 20], ['K1', 80, 30], ['K2', 120, 21], ['K3', 0, 20], ['K4', 80, 15]], [['L0', 3, 3], ['L1', 4, 10], ['L2', 2, 10], ['L3', 5, 3], ['L4', 2, 9], ['L5', 1, 6], ['L6', 4, 10]]], [['K0', 'L5'], ['K1', 'L4'], ['K2', 'L2'], ['K3', 'L0'], ['K4', 'L1']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 42', [[['K0', 51, 15]], [['L0', 5, 6], ['L1', 4, 10], ['L2', 1, 8], ['L3', 3, 9], ['L4', 4, 8]]], [['K0', 'L1']]], ['generated mix 51', [[['K0', 0, 21], ['K1', 80, 2], ['K2', 10, 20], ['K3', 80, 20]], [['L0', 5, 9], ['L1', 5, 9], ['L2', 1, 8], ['L3', 2, 3], ['L4', 1, 9], ['L5', 4, 8], ['L6', 4, 9]]], [['K0', None], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L6']]]]]
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
score tie prefers low level[['q', 'a']][['q', 'z']]Failed
generated mix 1[['K0', 'L2'], ['K1', 'L1'], ['K2', 'L0']][['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]Failed
heavy on level 2 ok[['h', 'b']][['h', 'b']]Passed
no eligible slot[['w', None]][['w', None]]Passed
tie in feed order[['a', 's1'], ['b', 's2']][['a', 's1'], ['b', 's2']]Passed
reservation at 50 picks[['f', 'g'], ['s', 'n']][['f', 'g'], ['s', 'n']]Passed
generated mix 7[['K0', 'L1'], ['K1', 'L0'], ['K2', None]][['K0', 'L1'], ['K1', 'L0'], ['K2', None]]Passed
generated mix 15[['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L0'], ['K5', 'L1']][['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]Failed

SHA-256 / 188418bab18ffc4d25f1d829cb4716d6f458860bef0ad2187b756ba4c910dd20

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(skus, slots):
    order = sorted(skus, key=lambda r: (-r[1], r[0]))
    used = set()
    out = {}
    for sku, picks, kg in order:
        best = None
        for s in sorted(slots, key=lambda s: (-s[2], -s[1], s[0])):
            sid, lvl, score = s
            if sid in used:
                continue
            if kg > 20 and lvl > 2:
                continue
            if score >= 8 and picks < 50:
                continue
            best = sid
            break
        if best is not None:
            used.add(best)
        out[sku] = best
    return [[k, out[k]] for k in sorted(out)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 1', [[['K0', 120, 21], ['K1', 49, 20], ['K2', 120, 15]], [['L0', 1, 3], ['L1', 4, 3], ['L2', 1, 9], ['L3', 2, 3]]], [['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 7', [[['K0', 51, 15], ['K1', 80, 30], ['K2', 10, 21]], [['L0', 1, 8], ['L1', 2, 3]]], [['K0', 'L1'], ['K1', 'L0'], ['K2', None]]], ['generated mix 15', [[['K0', 120, 21], ['K1', 0, 30], ['K2', 0, 21], ['K3', 80, 15], ['K4', 50, 2], ['K5', 80, 30]], [['L0', 5, 8], ['L1', 1, 3], ['L2', 3, 8], ['L3', 3, 6], ['L4', 2, 6], ['L5', 3, 10]]], [['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]]], [['generated mix 46', [[['K0', 80, 21], ['K1', 0, 15], ['K2', 80, 21]], [['L0', 2, 9], ['L1', 4, 3], ['L2', 3, 3], ['L3', 1, 9], ['L4', 2, 10]]], [['K0', 'L4'], ['K1', 'L2'], ['K2', 'L3']]], ['generated mix 23', [[['K0', 10, 15], ['K1', 80, 15], ['K2', 50, 2], ['K3', 51, 15], ['K4', 0, 21]], [['L0', 1, 6], ['L1', 3, 6], ['L2', 1, 9], ['L3', 3, 8]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', 'L0'], ['K3', 'L3'], ['K4', None]]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 9', [[['K0', 50, 20], ['K1', 50, 30], ['K2', 0, 21], ['K3', 10, 20], ['K4', 10, 20], ['K5', 51, 2]], [['L0', 3, 9], ['L1', 4, 6], ['L2', 2, 3]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', None], ['K3', None], ['K4', None], ['K5', 'L0']]], ['generated mix 17', [[['K0', 50, 30]], [['L0', 3, 3], ['L1', 2, 5], ['L2', 2, 10], ['L3', 2, 10], ['L4', 3, 10]]], [['K0', 'L2']]]], [['generated mix 65', [[['K0', 49, 2], ['K1', 80, 15], ['K2', 120, 30], ['K3', 10, 21]], [['L0', 4, 9], ['L1', 1, 9], ['L2', 4, 3], ['L3', 2, 6], ['L4', 2, 9], ['L5', 2, 5], ['L6', 3, 6]]], [['K0', 'L3'], ['K1', 'L4'], ['K2', 'L1'], ['K3', 'L5']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 20', [[['K0', 50, 15]], [['L0', 4, 3], ['L1', 3, 10], ['L2', 4, 8], ['L3', 5, 9]]], [['K0', 'L1']]], ['generated mix 28', [[['K0', 51, 20]], [['L0', 4, 5], ['L1', 4, 3], ['L2', 2, 8], ['L3', 2, 3], ['L4', 5, 6], ['L5', 5, 10]]], [['K0', 'L5']]]], [['generated mix 4', [[['K0', 120, 20], ['K1', 0, 30]], [['L0', 5, 3], ['L1', 5, 10], ['L2', 5, 10], ['L3', 2, 10], ['L4', 3, 3], ['L5', 1, 6], ['L6', 4, 3]]], [['K0', 'L3'], ['K1', 'L5']]], ['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 32', [[['K0', 51, 2], ['K1', 51, 21]], [['L0', 1, 3], ['L1', 5, 6], ['L2', 5, 10], ['L3', 2, 9], ['L4', 3, 8], ['L5', 5, 5]]], [['K0', 'L2'], ['K1', 'L3']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]]], [['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['generated mix 62', [[['K0', 49, 20], ['K1', 80, 30], ['K2', 120, 21], ['K3', 0, 20], ['K4', 80, 15]], [['L0', 3, 3], ['L1', 4, 10], ['L2', 2, 10], ['L3', 5, 3], ['L4', 2, 9], ['L5', 1, 6], ['L6', 4, 10]]], [['K0', 'L5'], ['K1', 'L4'], ['K2', 'L2'], ['K3', 'L0'], ['K4', 'L1']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 42', [[['K0', 51, 15]], [['L0', 5, 6], ['L1', 4, 10], ['L2', 1, 8], ['L3', 3, 9], ['L4', 4, 8]]], [['K0', 'L1']]], ['generated mix 51', [[['K0', 0, 21], ['K1', 80, 2], ['K2', 10, 20], ['K3', 80, 20]], [['L0', 5, 9], ['L1', 5, 9], ['L2', 1, 8], ['L3', 2, 3], ['L4', 1, 9], ['L5', 4, 8], ['L6', 4, 9]]], [['K0', None], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L6']]]]]
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
score tie prefers low level[['q', 'a']][['q', 'z']]Failed
generated mix 1[['K0', 'L2'], ['K1', 'L3'], ['K2', 'L1']][['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]Failed
heavy on level 2 ok[['h', 'b']][['h', 'b']]Passed
no eligible slot[['w', None]][['w', None]]Passed
tie in feed order[['a', 's1'], ['b', 's2']][['a', 's1'], ['b', 's2']]Passed
reservation at 50 picks[['f', 'g'], ['s', 'n']][['f', 'g'], ['s', 'n']]Passed
generated mix 7[['K0', 'L1'], ['K1', 'L0'], ['K2', None]][['K0', 'L1'], ['K1', 'L0'], ['K2', None]]Passed
generated mix 15[['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L0'], ['K5', 'L1']][['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]Failed

SHA-256 / d6062c3d7b3555814664e3e5de58920bb6e8b68265ecf1610feea05b857a641c

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 8 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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Verification & scope

Greedy stipulated slotting policy; real slotting optimizers weigh many more factors. 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 2026-09-29T14:52:08.560246+00:00.

Case digest / 44a1db54a8f1fc2b66853c5773a963f0b8bac3f924ac562b17d82cccf79398e8