ECLSS Preventive Maintenance Scheduler

Five life-support modules — a CO₂ scrubber sorbent bed, a water-recovery filter, an O₂ generator cell stack, a cabin fan bearing and a humidity condenser — each age toward failure along a Weibull "bathtub" hazard curve, the same reliability model used to size real spacecraft ECLSS spares manifests. Switch between a preventive strategy that auto-services a module once its reliability crosses a threshold and a reactive "run-to-fail" strategy that waits for an actual breakdown, both constrained by a weekly crew-hour budget that resets every seven simulated days. Watch system reliability, unplanned-failure count and crew-hours spent respond live as you trade planned maintenance time against the risk — and the cost — of letting hardware run until it breaks.