Accelerated Life Test Plans - Interval Censoring
main topic     see also 

Stat > Reliability/Survival > Test Plans > Accelerated Life Testing > Interval Censoring

Use interval censoring when you will be inspecting units for failures at pre-set intervals. You can space these intervals equally in time or in log time; or set intervals so that the expected number of failures in each is the same.

Dialog box items

Number of inspections for each stress level: Enter the number of inspections for each stress level, in order, from the lowest stress level to the highest stress level. You must have the same number entries as you have test stress levels.

Inspection Times

Equally spaced: Choose for equally spaced inspection times. In Last inspection time for each stress level, enter the last inspection time from the lowest stress level to the highest stress level. You must have the same number entries as you have test stress levels.

Equal probability: Choose for the expected proportion of failures to be the same in each interval. In Total percent of failures at each stress level, enter the expected percent of failures in the entire test from the lowest stress level to the highest stress level. You must have the same number entries as you have test stress levels.

Equally spaced in ln time: Choose for equally spaced natural log inspection times. In First inspection time for each stress level and Last inspection time for each stress level, enter the first and last times from the lowest stress level to the highest stress level. You must have the same number entries as you have test stress levels.