What MTBF Actually Tells You (and What It Doesn't)
July 28, 2026 · BlackCat Engineering
Mean Time Between Failures looks reassuring on a spec sheet — 5,000 hours, 10,000 hours — but it's an average across a population, not a promise about your unit. Two robots with identical MTBF can have completely different failure signatures.
Predictive maintenance ignores the average and watches the signatures: the specific telemetry conditions that precede a trip. A joint with 20mm position error, a battery drifting below 15% under load, an actuator trending hot — each is a leading indicator with its own lead time.
That's the shift: from 'how long until it fails on average' to 'which condition, on this unit, opens a maintenance window I can act on.' MTBF sets the baseline; signatures set the schedule.
Our insights pages publish the tracked failure modes and MTBF estimates per platform so you can plan parts and labor instead of reacting to downtime.