Overview of the Capability Platform

The Capability platform provides the tools needed to measure the compliance of a process to given specifications. By default, JMP shows a goal plot and capability box plot for each variable in the analysis. You can add normalized box plots, summary tables, capability indices, and an individual report for each variable in the analysis. Specification limits should be entered or available for each variable in the data table.

The individual detail reports include indices that help demonstrate a system’s ability to meet a set of requirements. Capability indices help change the focus from just meeting qualifications to continuous improvement of a process.

Capability analysis methods usually require that the data being studied is statistically stable, with no variation present. If a system is stable, capability analysis demonstrates the ability of the system in the past, and can also predict the system’s future performance.

The Capability platform has been replaced by the Process Capability platform. See Process Capability for more information about the new platform. The Capability platform has been removed from the Analyze > Quality and Process menu, and it is available only via scripting.

Note: The Process Capability platform expands significantly on the Capability analyses that are available through Analyze > Distribution and through Analyze > Quality and Process > Control Chart. By default, the Process Capability platform uses the appropriate AIAG notation for capability indices. It denotes an index constructed from an overall variation estimate using Ppk labeling. The previous Capability platform reported only overall variation with Cpk or Ppk labeling based on a platform preference. In the new platform, Cpk corresponds to within variation and Ppk corresponds to overall variation.