Process Capability Analysis
Process Capability Analysis |
Description | Process Capability Analysis is a computational method for comparing the output of a manufacturing process to its engineered specification limits. |
Why to use | Statistical Analysis |
When to use | To compare the output of a process with its specification limits. | When not to use | On non-normal or textual data. |
Prerequisites | The data should follow a normal distribution. |
Input | Numerical data | Output | - Process Data
- Process Capability Report for
- Overall Capability
- Within Capability
|
Statistical Methods used | - Shapiro Wilk’s Test for Normality
- Descriptive statistics
| Limitations | It can be used only on numerical data.
|
The Process Capability Analysis is mainly used in the manufacturing industry to measure the performance of a process. It checks how well the given process meets a set of specification limits by comparing the observed and expected values. It also takes into consideration a Lower Specification Limit and Upper Specification Limit. The values that lie between these two are considered as acceptable values. The output of Process Capability Analysis shows various performance metrics and W Statistic, and p-Value for Shapiro Wilk’s Test for Normality.
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