Number of Failures Calculations
The number of failures of the system in a given interval can be calculated. The start time of the computation is used as the starting point of the interval. This can be viewed as the expected total number of failures within time t, which is the end of the interval.
The number of failures is calculated using either an analytical method or simulation. The analytical method uses failure frequency to calculate the number of failures:
Where:
n f(t) = The number of failures within the time interval t 1 and t 2.
Numerical integration methods are used to compute the number of failures. The calculation of the number of failures using the simulation method is straightforward. A system failure flag and a repair flag are used to count the number of failures.