What is Western Electric Rules in SAP QM - Quality Management?

SAP Term: Western Electric Rules

• Component: QM

• Component Name: Quality Management

• Description: A set of criteria used to check for unusual patterns in a control chart. Western Electric Rules detect violations of control limits, unusual runs or trends, process that are out of control.

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• Key Concepts: 
  The Western Electric Rules (WER) are a set of statistical process control (SPC) rules used to identify and analyze process performance. They are used in Quality Management (QM) to detect changes in the process that may indicate a problem. The WER are based on the principles of Shewhart's control charts and consist of eight rules that can be used to detect changes in the process. 
  
  How to Use It: 
  The WER can be used to monitor a process over time and detect changes in the process that may indicate a problem. The eight rules are designed to detect different types of changes, such as shifts in the mean, trends, or outliers. When a rule is triggered, it indicates that there may be an issue with the process and further investigation is needed. 
  
  Tips & Tricks: 
  When using the WER, it is important to understand the different types of changes that can be detected by each rule. This will help you determine which rule is best suited for your particular process. Additionally, it is important to set appropriate control limits for each rule so that false alarms are minimized. 
  
  Related Information: 
  The WER are just one of many tools available for monitoring and analyzing processes in Quality Management. Other tools include Statistical Process Control (SPC) charts, Process Capability Analysis (PCA), and Design of Experiments (DOE).