After reformatting the data with Pre-Process Warranty Data, the data are interval censored, grouped in intervals of the form (t0, t1), (t1, t2),...,(tk-1, tk) such that each interval (ti-1, ti) contains ni failures (if ti is finite) or ni suspensions (if ti is infinite), i = 1, 2,..., k.
Total number of units = the total number of units shipped up to the present time
Observed number of failures = the number of shipped units that failed during the warranty period
If you do not specify a length of warranty (L), the expected number of failures (ENF) is given by:
= 1 if condition C is met, IC
= 0 otherwise.
If you specify a length of warranty (L), the expected number of failures is given by:
Number of units at risk for future time periods = the total number of right censored units under warranty
|R(t)||the reliability function|