Reliability Data - Lloyd-Lipow Model

This example appears in the Reliability Growth and Repairable System Analysis Reference book.

Given the reliability data in the table below, do the following:


 * 1) Fit the Lloyd-Lipow model to the data using least squares analysis.
 * 2) Plot the Lloyd-Lipow reliability with 90% 2-sided confidence bounds.
 * 3) How many months of testing are required to achieve a reliability goal of 90%?
 * 4) What is the attainable reliability if the maximum duration of testing is 30 months?

Solution


 * 1) The next figure displays the estimated parameters.




 * 2) The figure below displays Reliability vs. Time plot with 90% 2-sided confidence bounds.




 * 3) The next figure shows the number of months of testing required to achieve a reliability goal of 90%.




 * 4) The figure below displays the reliability achieved after 30 months of testing.