	Related Topics:
	Minimum Data Requirements for Weibull++

Case 3: 1 Failure and No Suspensions

Free-Form Data

Data Types:	Free-form only
Methods of Analysis	Rank Regression
Confidence Bounds Calculations?	NO
Distributions	2-parameter Weibull, 1-parameter exponential, 2-parameter exponential, normal and lognormal
Competing Failure Modes?	NO

Only rank regression is possible when using free-form data. MLE will be disabled.

With only one unique data point, only the 2-parameter Weibull, 1-parameter exponential, 2-parameter exponential, normal and lognormal analyses are possible. If you select a different distribution, a message box will appear notifying you that you need to switch analysis types, as shown next.

If you select to use a 2-parameter distribution, you will then be prompted to enter a value for one of the parameters. Remember that when using free-form data, you are supplying both the X and Y position for the entered data point. Given this point and a value for one of the parameters, the application will then solve for the other parameter. The parameter that you would like to solve for should be left as zero as shown below.

Other Data Types

Data Types:	All except free-form data
Methods of Analysis:	MLE
Confidence Bounds Calculations?	NO
Distributions:	1-parameter Weibull and 1-parameter exponential
Competing Failure Modes?	NO

With only one unique failure time, the application will notify you that only the 1-parameter Weibull and 1-parameter exponential distributions with MLE are available.

If you select the 1-parameter Weibull, you will then be prompted to enter the value of the known parameter.