Control Chart in Lean Six Sigma Introduction In Lean Six Sigma , a control chart is a fundamental statistical tool used to monitor process performance over time and ensure that improvements are sustained . It belongs primarily to the Control phase of DMAIC , where the focus is on maintaining process stability and preventing regression after improvements have been implemented. A control chart helps distinguish between normal process variation and abnormal variation that requires investigation and corrective action. What Is a Control Chart? A control chart is a time-ordered graphical display of process data with statistically determined limits. It answers a critical question: Is the process stable and predictable, or is something unusual happening? A typical control chart consists of: Center Line (CL) – the process average or mean Upper Control Limit (UCL) – upper boundary of expected variation Lower Control Limit (LCL) – lower boundary of expected variation Plotted data points o...
We will either find a way, or make one.

Comments
Post a Comment