PROJECT: Simple Flashlight Example - FMEA

FAILURE MODE, EFFECTS AND CRITICALITY ANALYSIS. PROJECT: Simple Flashlight Example FAILURE RATE: Failures/Million Hrs. ITEM CRITICALITY NUMBER * (Cr): SHEET: 1. MTBF: Hrs 1: MODULE: Flashlight 2: DATE: 8 Nov 2006. REF DES:1. 3: FUNCTION: Flashlight Part # FL164578-1 4 & Higher: PHASE: Normal Operation RD DESCRIPTION FMI FAILURE RATE / FAILURE MODE LOCAL EFFECTS NEXT HIGHER END EFFECTS COMPENSATING SEV FAIL EFFECT FAILMODE. MILLION HRS RATIO EFFECTS PROVISIONS CLASS PROB. CRIT. # * A1 Flashlight bulb FAAA dim light Flashlight output dim Flashlight output dim 3 FAAB no light no Flashlight output no Flashlight output 2 A2 Flashlight Switch FAAA intermittent Flashlight sometimes Flashlight sometimes will 3 will not turn on not turn on FAAB Stuck closed constant Flashlight constant Flashlight output 1 output FAAC Stuck open no Flashlight output no Flashlight output 2 A3 Flashlight Contact FAAA intermittent Flashlight sometimes Flashlight sometimes will 3 will not turn on not turn on FAAB no contact no Flashlight output no Flashlight output 2 FAAC poor contact Flashlight output dim Flashlight output dim 3 A4 Flashlight Battery FAAA low power Flashlight output dim Flashlight output dim 3

failure mode, effects and criticality analysis next higher effects sev class end effects sheet: 1 date: 8 nov 2006 fail effect prob. failmode crit. # * 1.e-6

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