Importing Data into a Weibull Data Set
You can use the Import Wizard to import data into any of the following Weibull tables: Weibull Data Points, Weibull Warranty Returns Data, and Weibull Warranty Sales Data. Exporting data from any Weibull table is not supported. For general information about using the Import Wizard, see Import and Export Wizard How-Tos.
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Data is imported into the ALT Data Points Table in the ALT module in a similar manner. For more information, see Importing Data into an ALT Data Set.
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When more than one module is in use, to import data into a Weibull data set, you must select Weibull on the Select Product Module page. After you identify the data source file and all necessary format information, the Import Wizard displays the Select Import Type page.
1. Indicate whether you want to import the data points in the source file into a new or existing data set and click Next.
Depending on you selection, either the New Data Set Parameters page or Choose Data Set page appears.
◦ If the New Data Set Parameters page appears, go to step 2.
◦ If the Choose Data Set page appears, go to step 3.
2. If the New Data Set Parameters page appears, do the following:
a. Specify the parameters to use for the new data set.
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Parameters
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Description
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Data set name
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The unique name to assign to the data set. By default, the name is New Data Set. If a data set with this name already exists, the name assigned is New Data Set (X), where (X) is the next available numeric value. You can specify any unique name that you want to use.
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Analysis type
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The type of analysis. Choices are Life Data, Non-Parametric LDA, and Reliability Growth. The default is Life Data, which is parametric analysis.
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Data type
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The type of data in the data set. The choices depend on the selection for Analysis type.
• When Life Data is selected, choices are Exact Times, Interval, and Free Form. The default is Exact Times. For more information, see Parametric Life Data Analysis (LDA).
• When Non-Parametric Life Data is selected, choices are Inspection and Interval. The default is Inspection. For more information, see Non-Parametric Life Data Analysis (LDA).
• When Reliability Growth is selected, choices are Duane Cumulative, Duane Interval, Crow/AMSAA Cumulative, and Crow/AMSAA Interval. The default is Duane Cumulative. For more information, see Reliability Growth Analysis.
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Suspensions
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Indicates whether the data to import contains only failures or both failures and suspensions. When this checkbox is cleared (default), only failures are present. When it is selected, both failures and suspensions are present.
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Grouped
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Indicates whether the data to import is grouped. When this checkbox is cleared (default), the data is not grouped. When it is selected, the data is grouped.
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Distribution
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The distribution to use to model failure times. Choices are Weibull, Lognormal, Normal, Gumbel- (Lower), Gumbel+ (Upper), Exponential, Rayleigh, Gamma, Logistic, and Log-logistic. The default is Weibull. For distribution descriptions, see Failure and Repair Distributions.
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b. Click Next. The Import Wizard displays the Select Field Assignments page. Go to step 4.
3. If the Choose Data Set page appears, do the following:
a. Click the drop-down control for Data set. A selection window opens, showing all life data sets for the module.
When importing into an existing warranty data set, only data sets in the return date or usage values format are available for selection.
b. Click the data set in which to import data. The window closes, and your selection is shown for Data set.
c. Click Next. The Import Wizard displays the Select Field Assignments page. Go to step 4.
4. Complete the Select Field Assignments page and all subsequent pages in the same manner as any other import. For more information, see Completing the Import.
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The column names shown on Select Field Assignments page are always the default column names, regardless as to whether you have specified custom column names as described in Changing the Names of Data Point Columns.
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