Non-Parametric Life Data Analysis Case Study For Weibull++ 7

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Weibull++ 7 Case Studies

Case Study 7 - Non-Parametric Life Data Analysis

Software Used:
Weibull++ 7

Background
A group of 55 units are put on a life test during which the units are evaluated every 50 hours. Use the simple actuarial method to determine reliability estimates for each failure time.

Experiment and Data
The results of the test are displayed in the table shown next.

Start Time	End Time	Number of Failures	Number of Suspensions
0	50	2	4
50	100	0	5
100	150	2	2
150	200	3	5
200	250	2	1
250	300	1	2
300	350	2	1
350	400	3	3
400	450	3	4
450	500	1	2
500	550	2	1
550	600	1	0
600	650	2	1

Analysis
Step 1: Using the New Project Wizard in Weibull++ 7, select to create a Non-Parametric Life Data Analysis Folio, as shown next.

New Project Wizard

Step 2: Select the Actuarial-Simple data type on the Control Panel. This will format the Data Sheet correctly for your input. Next, enter the data from Table 1 into the Data Sheet, as shown next.

Data Sheet for Actuarial-Simple data

Step 3: Click Calculate to calculate the reliability estimates for the data set, then click Show Analysis Summary to display the results in the Results Panel, as shown next.

Results Panel