Webull++ Warranty Dates Format Example

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Warranty Data Analysis Dates Format Example

Assume a company has the following information for a product.

Sales

Quantity In-Service Date In-Service
6316 1/1/2010
8447 2/1/2010
5892 3/1/2010
596 4/1/2010
996 5/1/2010
8977 6/1/2010
2578 7/1/2010
8318 8/1/2010
2667 9/1/2010
7452 10/1/2010
1533 11/1/2010
9393 12/1/2010
1966 1/1/2011
8960 2/1/2011
6341 3/1/2011
4005 4/1/2011
3784 5/1/2011
5426 6/1/2011
4958 7/1/2011
6981 8/1/2011


Returns

Quantity Returned Date of Return Date In-Service
2 10/29/2010 10/1/2010
1 11/13/2010 10/1/2010
2 3/15/2011 10/1/2010
5 4/10/2011 10/1/2010
1 11/13/2010 11/1/2010
2 2/19/2011 11/1/2010
1 3/11/2011 11/1/2010
2 5/18/2011 11/1/2010
1 1/9/2011 12/1/2010
2 2/13/2011 12/1/2010
1 3/2/2011 12/1/2010
1 6/7/2011 12/1/2010
1 4/28/2011 1/1/2011
2 6/15/2011 1/1/2011
3 7/15/2011 1/1/2011
1 8/10/2011 2/1/2011
1 8/12/2011 2/1/2011
1 8/14/2011 2/1/2011


Future Sales

Quantity In-Service Date In-Service
5000 9/1/2011
5000 10/1/2011
5000 11/1/2011
5000 12/1/2011
5000 1/1/2012


Using the above information, we want to estimate the failure distribution of this product and forecast warranty returns.

Solution

Step 1: The data can be entered into a Warranty folio with Dates Format. They are given in the figures below.

Warranty Dates Format Sales.png
Warranty Dates Format Returns.png
Warranty Dates Format Future Sales.png


Step 2: Set the calculation setting as:

Warranty Dates Format Calculation Settings.png

Please make sure the End of Observation Period to be 8/14/2011.

Step 3: Click on Calculate Button, you get the results shown in the Analysis Summary in the above figure. You also click on the Analysis Summary to view more results.

Warranty Dates Format Summary.png

In the bottom part of the above figure, you can see the warranty data is converted to data format that can be used in standard Weibull++ folio.

Step 4: Click on the Forecast button Warranty Dates Format Forecast button.png to get the following forecast window.

Warranty Dates Format Forecast Window.png

Click on OK to get the forecast return for the future months. Please remember, the current time was set to 8/14/2011.

Step 5: Click on the plot button, and choose the Expected Failures plot. The predicted number of returns for each month was plotted.

Warranty Dates Format Predicted Failures Plot.png

The rest plots in the plot type drop down list are the same plots as in Webull++ standard folio.