Abstract
The CCC chart, or the count of conforming control chart, is first developed in Calvin (1983) to monitor zero-defects processes. It was further studied and given the name CCC chart in Goh (1987). This is a powerful technique for process control when a large number of consecutive conforming items are observed between two nonconforming ones. A control chart can be set up to monitor this number and decisions made based on whether this number is too large or too small. In this chapter, this type of control chart is described in detail. Decision making procedures are presented for various situations. Different versions of CCC chart are also discussed. The CCC chart is very useful for one-at-atime inspections or tests which are common in automated manufacturing process. It is generally a technique for high quality processes when nonconforming items are rarely observed.
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