There are different types of process control charts, depending on the nature and distribution of your data. For example, you can use an X-bar and R chart for continuous data that is grouped into ...

Learn how to use SPC charts, or statistical process control charts, to monitor the variation and performance of a process in each phase of the DMAIC methodology in Lean Six Sigma.

Key Points An I-MR chart is a control chart used for process stability. It relies on continuous data. They only provide a ...

Quality and loss of products are crucial factors in competitive companies, and firms widely adopt a loss function to measure the loss caused by a deviation in the quality variable from the target ...

Abstract: As an extension of the standard Poisson distribution, the Zero-inflated Poisson distribution (ZIP) is used to model the defects in the process with a large number of zeros in the process ...