05 Exercises

Module 3 Assessing & Selecting Models for Time-to-Failure Data

Lesson M03-05

Text: Section 5

Participant Guide: Module 3 pages 22 & 23

Duration: 18 minutes

Here, you have an opportunity to practice using Minitab to produce probability plots to a couple of datasets and interpret the results.

Exercises

1. 8 units were tested until failure and the failure times (in cycles) are: 5323, 2133, 16709, 7746, 8782, 14033, 2406, 2699 (Data is also found in Dataset_1.MTW)

a) Use Distribution Fitting to fit Weibull, Lognormal, and Exponential distributions to the data

b) What are your conclusions?

2. 20 switches were put on a rig test. 15 units failed and 5 were right-censored (Data is found in Dataset_2.MTW)

a) Use Distribution Fitting to find plausible distributions that describe the data

b) What are your conclusions?

Here are the two exercise files mentioned:

Dataset_1.MTW
Dataset_2.MTW