{"abstract":"The slowest SKUs grab the best slots before the fastest movers are considered.","category":"Warehouse slotting and bin packing","checks":8,"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.","contract_signature":"skus, slots","evaluation_group":"w2-warehouse-slotting-golden-zone","failed_approach":"Dropping the sku tie-break leaves equal-velocity SKUs in feed order, so slot outcomes depend on input order.","family":"w2-warehouse-slotting-golden-zone-sku-processing-order","id":"FA-94886","implementations":{"attempt":{"sha256":"d070823975de7d18a4e7d1bdf9eca6edb5439a98b63cc596f577fd5b6ea090e1","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(skus, slots):\n    order = sorted(skus, key=lambda r: -r[1])\n    used = set()\n    out = {}\n    for sku, picks, kg in order:\n        best = None\n        for s in sorted(slots, key=lambda s: (-s[2], s[1], s[0])):\n            sid, lvl, score = s\n            if sid in used:\n                continue\n            if kg > 20 and lvl > 2:\n                continue\n            if score >= 8 and picks < 50:\n                continue\n            best = sid\n            break\n        if best is not None:\n            used.add(best)\n        out[sku] = best\n    return [[k, out[k]] for k in sorted(out)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['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']]], ['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']]], ['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 10', [[['K0', 51, 20], ['K1', 50, 30], ['K2', 50, 21]], [['L0', 1, 5], ['L1', 2, 8], ['L2', 2, 3], ['L3', 1, 6], ['L4', 2, 8], ['L5', 1, 6]]], [['K0', 'L1'], ['K1', 'L4'], ['K2', 'L3']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['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 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 18', [[['K0', 80, 20], ['K1', 120, 20], ['K2', 120, 30], ['K3', 120, 20], ['K4', 80, 21], ['K5', 10, 20]], [['L0', 1, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 1, 3], ['L4', 2, 5], ['L5', 1, 3]]], [['K0', 'L4'], ['K1', 'L0'], ['K2', 'L2'], ['K3', 'L1'], ['K4', 'L3'], ['K5', 'L5']]], ['generated mix 26', [[['K0', 120, 15], ['K1', 0, 2], ['K2', 80, 21]], [['L0', 3, 9], ['L1', 5, 6], ['L2', 1, 3], ['L3', 4, 10]]], [['K0', 'L3'], ['K1', 'L1'], ['K2', 'L2']]]], [['generated mix 22', [[['K0', 120, 20], ['K1', 80, 2], ['K2', 120, 15], ['K3', 80, 2], ['K4', 49, 20], ['K5', 0, 15]], [['L0', 2, 3], ['L1', 4, 8], ['L2', 4, 10], ['L3', 2, 10], ['L4', 1, 3]]], [['K0', 'L3'], ['K1', 'L1'], ['K2', 'L2'], ['K3', 'L4'], ['K4', 'L0'], ['K5', 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']]], ['two skus compete', [[['a', 90, 1], ['b', 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 29', [[['K0', 50, 20]], [['L0', 4, 3], ['L1', 4, 10], ['L2', 5, 6]]], [['K0', 'L1']]], ['generated mix 37', [[['K0', 49, 2], ['K1', 0, 20], ['K2', 50, 20], ['K3', 120, 21], ['K4', 10, 30]], [['L0', 4, 6], ['L1', 3, 5], ['L2', 2, 8], ['L3', 1, 8]]], [['K0', 'L0'], ['K1', 'L1'], ['K2', 'L2'], ['K3', 'L3'], ['K4', None]]]], [['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']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['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 31', [[['K0', 0, 21], ['K1', 10, 21], ['K2', 80, 2], ['K3', 0, 21], ['K4', 80, 2]], [['L0', 2, 5], ['L1', 4, 6], ['L2', 4, 3], ['L3', 2, 3], ['L4', 3, 8]]], [['K0', 'L3'], ['K1', 'L0'], ['K2', 'L4'], ['K3', None], ['K4', 'L1']]], ['generated mix 39', [[['K0', 0, 2], ['K1', 80, 15]], [['L0', 5, 8], ['L1', 1, 5], ['L2', 5, 8], ['L3', 1, 9], ['L4', 5, 9]]], [['K0', 'L1'], ['K1', 'L3']]], ['generated mix 48', [[['K0', 50, 20], ['K1', 120, 15], ['K2', 0, 2], ['K3', 80, 30]], [['L0', 2, 10], ['L1', 3, 9], ['L2', 1, 9], ['L3', 2, 8], ['L4', 1, 10]]], [['K0', 'L2'], ['K1', 'L4'], ['K2', None], ['K3', 'L0']]]], [['generated mix 52', [[['K0', 10, 20], ['K1', 10, 15], ['K2', 0, 21], ['K3', 0, 30], ['K4', 0, 20]], [['L0', 5, 9], ['L1', 3, 5]]], [['K0', 'L1'], ['K1', None], ['K2', None], ['K3', None], ['K4', 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']]], ['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 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 59', [[['K0', 0, 21], ['K1', 51, 20], ['K2', 120, 15]], [['L0', 2, 8], ['L1', 5, 10], ['L2', 4, 5], ['L3', 3, 9], ['L4', 3, 5], ['L5', 3, 8]]], [['K0', None], ['K1', 'L3'], ['K2', 'L1']]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"b99f35a000be120eb054e37620a975464abd5a1c605d0cb42c8d9fbb1f7ef8db","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(skus, slots):\n    order = sorted(skus, key=lambda r: (r[1], r[0]))\n    used = set()\n    out = {}\n    for sku, picks, kg in order:\n        best = None\n        for s in sorted(slots, key=lambda s: (-s[2], s[1], s[0])):\n            sid, lvl, score = s\n            if sid in used:\n                continue\n            if kg > 20 and lvl > 2:\n                continue\n            if score >= 8 and picks < 50:\n                continue\n            best = sid\n            break\n        if best is not None:\n            used.add(best)\n        out[sku] = best\n    return [[k, out[k]] for k in sorted(out)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['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']]], ['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']]], ['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 10', [[['K0', 51, 20], ['K1', 50, 30], ['K2', 50, 21]], [['L0', 1, 5], ['L1', 2, 8], ['L2', 2, 3], ['L3', 1, 6], ['L4', 2, 8], ['L5', 1, 6]]], [['K0', 'L1'], ['K1', 'L4'], ['K2', 'L3']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['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 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 18', [[['K0', 80, 20], ['K1', 120, 20], ['K2', 120, 30], ['K3', 120, 20], ['K4', 80, 21], ['K5', 10, 20]], [['L0', 1, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 1, 3], ['L4', 2, 5], ['L5', 1, 3]]], [['K0', 'L4'], ['K1', 'L0'], ['K2', 'L2'], ['K3', 'L1'], ['K4', 'L3'], ['K5', 'L5']]], ['generated mix 26', [[['K0', 120, 15], ['K1', 0, 2], ['K2', 80, 21]], [['L0', 3, 9], ['L1', 5, 6], ['L2', 1, 3], ['L3', 4, 10]]], [['K0', 'L3'], ['K1', 'L1'], ['K2', 'L2']]]], [['generated mix 22', [[['K0', 120, 20], ['K1', 80, 2], ['K2', 120, 15], ['K3', 80, 2], ['K4', 49, 20], ['K5', 0, 15]], [['L0', 2, 3], ['L1', 4, 8], ['L2', 4, 10], ['L3', 2, 10], ['L4', 1, 3]]], [['K0', 'L3'], ['K1', 'L1'], ['K2', 'L2'], ['K3', 'L4'], ['K4', 'L0'], ['K5', 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']]], ['two skus compete', [[['a', 90, 1], ['b', 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 29', [[['K0', 50, 20]], [['L0', 4, 3], ['L1', 4, 10], ['L2', 5, 6]]], [['K0', 'L1']]], ['generated mix 37', [[['K0', 49, 2], ['K1', 0, 20], ['K2', 50, 20], ['K3', 120, 21], ['K4', 10, 30]], [['L0', 4, 6], ['L1', 3, 5], ['L2', 2, 8], ['L3', 1, 8]]], [['K0', 'L0'], ['K1', 'L1'], ['K2', 'L2'], ['K3', 'L3'], ['K4', None]]]], [['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']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['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 31', [[['K0', 0, 21], ['K1', 10, 21], ['K2', 80, 2], ['K3', 0, 21], ['K4', 80, 2]], [['L0', 2, 5], ['L1', 4, 6], ['L2', 4, 3], ['L3', 2, 3], ['L4', 3, 8]]], [['K0', 'L3'], ['K1', 'L0'], ['K2', 'L4'], ['K3', None], ['K4', 'L1']]], ['generated mix 39', [[['K0', 0, 2], ['K1', 80, 15]], [['L0', 5, 8], ['L1', 1, 5], ['L2', 5, 8], ['L3', 1, 9], ['L4', 5, 9]]], [['K0', 'L1'], ['K1', 'L3']]], ['generated mix 48', [[['K0', 50, 20], ['K1', 120, 15], ['K2', 0, 2], ['K3', 80, 30]], [['L0', 2, 10], ['L1', 3, 9], ['L2', 1, 9], ['L3', 2, 8], ['L4', 1, 10]]], [['K0', 'L2'], ['K1', 'L4'], ['K2', None], ['K3', 'L0']]]], [['generated mix 52', [[['K0', 10, 20], ['K1', 10, 15], ['K2', 0, 21], ['K3', 0, 30], ['K4', 0, 20]], [['L0', 5, 9], ['L1', 3, 5]]], [['K0', 'L1'], ['K1', None], ['K2', None], ['K3', None], ['K4', 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']]], ['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 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 59', [[['K0', 0, 21], ['K1', 51, 20], ['K2', 120, 15]], [['L0', 2, 8], ['L1', 5, 10], ['L2', 4, 5], ['L3', 3, 9], ['L4', 3, 5], ['L5', 3, 8]]], [['K0', None], ['K1', 'L3'], ['K2', 'L1']]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"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.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-warehouse-slotting-golden-zone-sku-processing-order","generated_at":"2026-09-29T14:52:08.560321+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Forward pick slotting places the fastest movers in ergonomic golden-zone locations.","root_cause":"The SKU processing order sorts weekly picks ascending.","sha256":"282b63994aa5fd2c29960b7d190ddb78ee99184fe2a0bb8dd4421588f3308390","title":"Golden zone: slow SKUs choose slots first · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":42.364,"exit_code":1,"observations":[{"actual":[["K0","L2"],["K1","L3"],["K2","L0"]],"check":"generated mix 1","expected":[["K0","L2"],["K1","L3"],["K2","L0"]],"passed":true},{"actual":[["a","s2"],["b","s1"]],"check":"tie in feed order","expected":[["a","s1"],["b","s2"]],"passed":false},{"actual":[["h","b"]],"check":"heavy on level 2 ok","expected":[["h","b"]],"passed":true},{"actual":[["q","z"]],"check":"score tie prefers low level","expected":[["q","z"]],"passed":true},{"actual":[["a","s1"],["b","s2"]],"check":"two skus compete","expected":[["a","s1"],["b","s2"]],"passed":true},{"actual":[["f","g"],["s","n"]],"check":"reservation at 50 picks","expected":[["f","g"],["s","n"]],"passed":true},{"actual":[["K0","L1"],["K1","L0"],["K2",null]],"check":"generated mix 7","expected":[["K0","L1"],["K1","L0"],["K2",null]],"passed":true},{"actual":[["K0","L4"],["K1",null],["K2",null],["K3","L5"],["K4","L2"],["K5","L1"]],"check":"generated mix 15","expected":[["K0","L4"],["K1",null],["K2",null],["K3","L5"],["K4","L2"],["K5","L1"]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"generated mix 1\", \"actual\": [[\"K0\", \"L2\"], [\"K1\", \"L3\"], [\"K2\", \"L0\"]], \"expected\": [[\"K0\", \"L2\"], [\"K1\", \"L3\"], [\"K2\", \"L0\"]], \"passed\": true}, {\"check\": \"tie in feed order\", \"actual\": [[\"a\", \"s2\"], [\"b\", \"s1\"]], \"expected\": [[\"a\", \"s1\"], [\"b\", \"s2\"]], \"passed\": false}, {\"check\": \"heavy on level 2 ok\", \"actual\": [[\"h\", \"b\"]], \"expected\": [[\"h\", \"b\"]], \"passed\": true}, {\"check\": \"score tie prefers low level\", \"actual\": [[\"q\", \"z\"]], \"expected\": [[\"q\", \"z\"]], \"passed\": true}, {\"check\": \"two skus compete\", \"actual\": [[\"a\", \"s1\"], [\"b\", 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