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Maintenance & Reliability

MTBF, MTTR, availability, downtime cost, PM compliance, backlog and spares. 14 free tools.

Reliability KPIs Maintenance strategy Cost & planning Spares

Reliability KPIs 4

MTBF calculatorMean time between failures from run time and failure count.MTTR calculatorMean time to repair from total repair time and number of repairs.Equipment availability calculatorInherent availability from MTBF and MTTR, and uptime from hours.Reliability (probability of survival) calculatorChance of running a period without failure, given MTBF.

Maintenance strategy 3

P-F interval inspection frequencyHow often to inspect so you catch a failure before it happens.Wrench time calculatorShare of paid time spent hands-on doing maintenance.Repair vs replace (payback) calculatorCompare repairing an old asset with buying a new one.

Cost & planning 5

Downtime cost calculatorCost of an hour of downtime, including lost margin and labour.PM compliance calculatorPercentage of preventive maintenance done on time.Planned maintenance percentage (PMP)Share of maintenance hours that were planned.Maintenance backlog (weeks) calculatorHow many crew-weeks of work are waiting.Maintenance cost as % of RAVAnnual maintenance spend against replacement asset value.

Spares 2

Spare parts reorder point and safety stockSafety stock and reorder point from usage and lead time.Spares quantity calculator (Poisson)How many spares to hold to cover failures across a fleet.