Work it in order. The FMEA drill first, on failure modes the program already handed you, then the two judgment scenarios, then your Riverside reliability plan.
Four failure modes from the lesson. For each one, write the effect on the system, mark the criticality (whole line or local), and make the spares call: held on the shelf, stocked wear part, or source when needed. The criticality labels here are illustrative, the ranking discipline is the point; targets carry no numbers because MTBF and MTTR are set with the customer.
| Failure mode | Effect on the system | Criticality | Spare held? |
|---|---|---|---|
| Sorter down | |||
| Compressor air-pressure drop at peak | |||
| Transfer O-ring drift | |||
| Takeaway spur down (Door 1, 2, or 3) |
Check your sort: did anything land on the shelf because it fails often? Frequency is the wrong sort key. Criticality times lead time is the right one.
One component fails rarely but takes a full shift to fix and needs a long-lead part. Another fails twice as often but is back in five minutes with a part on the shelf. Which one gets the spare held on site, and why is "the one that fails most" the wrong instinct?
A customer's maintenance is one reactive technician with no PM program, and your best-performing design needs weekly proactive maintenance to hit its reliability targets. What do you change about the design, what does that change cost or trade off, and what do you tell the customer before they sign?