Free App for Process Capability Study 2.0

A free app for conducting a process capability study is available. With traditional process capability Cp, Cpk, Pp, and Ppk indices reporting, there are fundamental “elephant in the room” problems that this app resolves.

These not-talked-about process capability indices reporting issues include:

  • Is the process stable? If the process is not stable, reported process capability indices values are invalid. How would someone know if a process is stable since a traditional process-capability-report-out only provides process capability indices, no time-series information?
  • Is the collection of data relative to subgrouping appropriately considered and analyzed? Cp and Cpk values could be dramatically different for data-subgrouping versus no-data-subgrouping the response from a process.
  • Is any data non-normality considered appropriately in the reported process capability numbers? Traditional Cp, Cpk, Pp, and Ppk report-outs do not address data non-normality effectively.
  • How can a process capability statement be determined when there is no specification? A specification is a requirement for traditional process capability reporting; however, organizations need to understand the “capability” of a process that does not have an actual specification; e.g., the lead-time response from an operation.
  • How can a statistical process improvement be effectively communicated (and when any change occurred) with process capability indices reporting, so there is no confusion? Someone cannot achieve this important objective with a traditional process capability report-out, which does not include process tracking over time.
  • Should a Cp and Cpk criteria or Pp and Ppk criteria be specified for a process-output response? Organizations often select a Cp and Cpk criteria; however, the determination of these values from subgrouped data only reflects the variability within subgroups. Between subgroup-variability can be a critical consideration when determining how well a process performs relative to a customer’s specification.
  • What physically do process capability indices truly mean relative to the achievement of customer requirements so that the report-out leads to the most appropriate actions or non-actions? Everyone throughout an organization should easily understand from a report-out how well a process performs relative to customer desires, which traditional Cp, Cpk, Pp, and Ppk reporting does not provide.

Process Capability Study 2.0 with a Free App

Over the years, many of my annual Quality Progress and other ASQ articles describe the benefits of 30,000-foot-level response output response tracking, which addresses all of the previously listed traditional process-capability problems – and more.

A free app is now available for creating 30,000-foot-level charts.  This stand-alone app does not require any statistical software and is not an Excel add-in. This app can address various process output data formats:

  • No subgrouping
  • Subgrouping
  • Attribute

process capability study 2.0

One can assess this free process-metric-response app to create 30,000-foot-level charting (which provides enhanced process capability study response reporting) via the link

For additional information about the described 2.0 process capability study methodology. see the article in the referenced link below.


ASQ Quality Progress October 2021 published article titled “An App Alternative: New process capability reporting app and how-to business management enrichments” by Forrest Breyfogle describes the creation of metrics reporting from a high-level point of view that leads to long-lasting process improvements. Downloaded this article through the following link.


Contact Us to set up a time to discuss how your organization might gain much from an Integrated Enterprise Excellence (IEE) Business Process Management System and its business goal setting methodology with achievement tracking approach.  

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