Starship Build Engineering System
Verification Report
Verification Report — Starship Build Engineering System
Strictness: IRS_AUDITOR | Proof status: Internal verification on hand-checkable fixtures + a notional-model synthetic benchmark (disclosed seam).
Checks: PASS 18 / 18 (100%) | Evaluated on: structural fixtures + notional Starship build model | Generated: 2026-06-25T22:23:34.426Z
Disclosed seams & limitations
- DISCLOSED_SEAM: The Starship build model in src/vehicle.mjs (operations, times, weld samples, tolerances, part counts) is NOTIONAL, self-authored engineering data — NOT SpaceX proprietary data, as-built process sheets, or measured production figures.
- DISCLOSED_SEAM: No physical hardware, fixture, weld, or station was built or measured; all results are computed from the model only.
- SIMULATED: The "synthetic benchmark" quantifies line-balancing skill on the notional model; it is not a claim about any real production rate or factory.
- ASSUMPTION: Process-capability fallout assumes the measured feature is normally distributed and the process is in statistical control.
What is verified
Each engine is exercised against inputs whose answers are known by hand (takt, theoretical-minimum stations, an exactly-balanceable chain, the closed-form CPM of a tiny network, a textbook Cp/Cpk sample, the ±3σ yield, an exact worst-case/RSS tolerance pair, and a 70%/60% DFM reduction). The same engines then run on the notional Starship build model, and the balanced line is benchmarked against a naive one-operation-per-station baseline at the same takt.
Synthetic benchmark (notional model)
| Metric | Value |
|---|---|
| Takt | 60 min |
| Operations | 16 |
| Stations (baseline -> balanced) | 16 -> 11 |
| Station reduction | 31.3% |
| Line efficiency (baseline -> balanced) | 52.1% -> 75.8% |
| Efficiency improvement | 45.5% |
| Throughput | 8 vehicles/day |
| Critical-path lead time | 56 h |
Checks
| Check | Detail | Result |
|---|---|---|
| Takt time = available / demand (480 min / 8 = 60 min) | takt=60 | PASS |
| Theoretical min stations = ceil(work/takt) = ceil(500/60) = 9 | total=500, min=9 | PASS |
| Exact balance: 4x30min chain @ takt 60 -> 2 stations, 100% efficiency | stations=2, eff=1 | PASS |
| Vehicle balance respects precedence, station<=takt, min<=N<=ops | viol=0, stations=11, underTakt=true | PASS |
| Line efficiency identity = work/(stations*cycle), 0<eff<=1 | eff=0.757576, recomputed=0.757576 | PASS |
| Line balancing is deterministic (identical stations & efficiency) | 11==11, 0.757576==0.757576 | PASS |
| Throughput = available / bottleneck (480/60 = 8 units) | tp=8 | PASS |
| Parallel stations for a 130-min op @ takt 60 = ceil(130/60) = 3 | n=3 | PASS |
| CPM exact: A(3),B(4)->C(2) => duration 6, critical path B,C | dur=6, path=B,C | PASS |
| CPM vehicle flow: lead time 56 h, critical A,B,E,F,G, slacks D=14 C=2 | dur=56, path=A,B,E,F,G, D=14, C=2 | PASS |
| Process capability exact: [9,10,11], spec 7..13 => mean 10, sd 1, Cp 1.0, Cpk 1.0 | mean=10, sd=1, Cp=1, Cpk=1 | PASS |
| Normal CDF anchors: Phi(0)=0.5, Phi(1.96)~0.975, symmetry, erf(0)=0 | Phi(0)=0.5000000005, Phi(1.96)=0.9750 | PASS |
| +/-3 sigma capability: yield ~ 0.9973, ~2700 ppm defective | yield=0.9973, ppm=2699.93 | PASS |
| Tolerance exact: tol [0.1,0.2,0.2] => WC 0.5, RSS 0.3 | WC=0.5, RSS=0.3 | PASS |
| Tolerance invariant: RSS <= worst-case for every vehicle stack | stacks=2 | PASS |
| DFM exact: 40->12 parts => 70% reduction; 100->40s => 60% faster | parts=0.7, time=0.6 | PASS |
| DFA: 2 essential parts, 2 consolidation candidates identified | min=2, candidates=2 | PASS |
| Benchmark: balanced line uses <= stations and >= efficiency vs naive baseline | stations 16->11, eff 0.520833->0.757576 | PASS |