Editing Failure rate (section)

===Simple example===
Suppose it is desired to estimate the failure rate of a certain component. Ten identical components are each tested until they either fail or reach 1,000 hours, at which time the test is terminated. A total of 7,502 component-hours of testing is performed, and 6 failures are recorded.

The ''estimated'' failure rate is:

: <math>\frac{6\text{ failures}}{7502\text{ hours}} = 0.0007998\, \frac{\text{failures}}{\text{hour}} </math>

which could also be expressed as a MTBF of 1,250 hours, or approximately 800 failures for every million hours of operation.