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IMIts Me Harainstatsmind.hashnode.dev·Nov 6, 2025 · 4 min read

🧮 Control Charts Explained: When to Use Which One

Control Charts Explained: X̄, R, S, n, np, c, and u Charts — When to Use Which One In quality control, control charts are powerful tools used to monitor process stability and detect variations over time. They help us identify whether a process is in ...

IMIts Me Harainstatsmind.hashnode.dev·Nov 6, 2025 · 5 min read

📘 Control Chart Constants — Notes and Formulas

In Statistical Quality Control (SQC), the control chart constants such as A₁, A₂, A₃, D₃, D₄, B₃, B₄, c₄, d₂, etc., are standard factors derived from statistical theory (mainly based on the sampling distribution of the range or standard deviation). B...