Mtbf (Mean-Time Between Failure) Data - Comdial DX-80 Technical Manual

Overview

1.15.10 MTBF (MEAN-TIME BETWEEN FAILURE) DATA

Cabinet Assembly
Power Supply Unit
CPM
408M
DPM8
COM4
APM4
MDM
AAM
Method:
Use the figures above for each unit installed (or to
be installed) and calculate the total for this system
configuration.
Use the total from step 1 in place of the variable
"x" in the formula at the right to calculate MTBF
for this system configuration.
38
Mean-Time Between Failure Analysis
System Components
Comdial
86.0
170.0
2915.7
11407.3
3560.8
6146.5
6860.2
761.0
2337.3
(1 ³ )x(109) = MTBF hours
October, '03