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Stability tests are a key Six Sigma tool used to evaluate the consistency and reliability of a process over time. By analyzing data collected from different time periods, stability tests determine if a process remains within control limits and operates predictably. These tests help identify trends, shifts, or variations that may indicate potential issues. Stability […]

An Exponentially Weighted Moving Average (EWMA) chart is a Six Sigma tool used to monitor process performance by giving more weight to recent data points. Unlike traditional control charts, EWMA charts emphasize recent observations, making them highly sensitive to small shifts in the process mean. This tool helps in early detection of process changes and […]

A Cumulative Sum Chart (CUMSUM) is a Six Sigma tool used for monitoring process performance and detecting small shifts in the process mean. It plots the cumulative sum of deviations from a target value, helping to identify trends and patterns over time. By focusing on cumulative deviations, CUMSUM charts enhance sensitivity to small but consistent […]

What is Project Closure in Six Sigma Typically, by describing a project closure, you can identify project completion criteria. This, in turn, helps identify performance improvements and additional opportunities. It is a formal project summation in which the project team can officially close the project. It allows for the quick handover of deliverables and documentation. […]

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Control phase is the fifth and final phase of Lean Six Sigma projects. Following are the deliverable of this phase: Prepare Control Plan Final Implementation Establish Statistical Process Control (SPC) Benefits Computation & Closure Prepare Control Plan Control Plan or Process Management Plan is a document ensuring that a robust mechanism to monitor and follow-up […]

All processes need a control or management mechanism to ensure that they meet or exceed customer expectations consistently.  Process parameters that go out of control need to be restored back to their normal values. How fast this has to be done depends on the type of process. For a surgeon, he needs to restore parameters […]