Dear friends,

We are presenting a demo version of Capa software with several remarks on the most common mistakes made in capability assessment. But first of all: Why do you need the Capa software designed specifically for capability assessment? You might calculate routinely the Cpk index which is available in every software of the kind.

The problem is that the Cpk index cannot be always calculated correctly, for any production process and any tolerance. Then, however, it makes sense to ask many other questions, such as:

• When can the Cpk index be used?
• What are the prerequisites for using the Cpk index?
• How is the validity of the prerequisites verified?
• What follows in case the prerequisites prove to be invalid?
• What happens if I ignore the required prerequisites?
• Who will mainly bear the consequences of imprecise capability assessment - customers or suppliers?
• What information can be inferred from the calculated index?
• What does complex capability assessment mean?
• What should precede and follow before and after the capability index calculation?
• Are graphical methods also used in capability assessment?
• What role does a type of tolerance have in the capability assessment?
• How does the capability assessment look like when multivariate quality characteristics are involved?
• How is the capability of jobshop production output assessed?
• What tricks do suppliers use when presenting their capability and how to reveal those tricks?
• Is it possible to assess capability when controlling calibration, i.e. without taking measures?
• How to assess in a complex way the capability of products whose several independant quality characteristics are observed?
• Under what circumstances does it suffice to assess only variability (without centralization)?

The Capa software is designed for capability assessment for any existing situation

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Josef Tosennovsky