This is the classic course on Statistical Process Control (SPC), which covers the basic principles of control charts. The principles are described in layman’s terms for those who desire a thorough understanding of statistical process control without having to cope with elaborate mathematics.
Control charts are based upon statistical principles; in particular the normal distribution, and they are used to determine when the process being monitored is “out-of-control.” When we claim the process is “out-of-control” we want to make such pronouncement with minimal “false alarms” as possible. To balance the false alarms from the true claims is where statistics (probabilities) come in handy.
A process that is “out-of-control” is one that is not in a state of statistical control, or one in which the process variable being plotted does not have a stable distribution. So, control charts are used to determine if a process is stable while it produces product.
Improvement to a process comes from identifying and eliminating "special cause" variation.
The course also teaches how to interpret, analyze and implement control charts in production.
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