The Levey–Jennings (LJ) chart is one of the most widely used tools for routine quality control. Introduced in 1950 by Stanley Levey and E. R. Jennings for clinical laboratories. This article explains what an LJ chart is, how it differs from other con...
Lean Six Sigma has been the trusted method for solving problems and improving processes for years. From reducing defects to eliminating waste, it has helped professionals across industries create better systems and more consistent results.But things...
Artificial Intelligence (AI), once a concept reserved for tech labs and research papers, is now a practical tool that can help quality managers meet these challenges with unprecedented speed and precision. At the forefront of this shift is ChatGPT, a...
Click to View all 10 Videos The ASQ Certified Construction Quality Manager (CCQM) is a newly introduced credential from the American Society for Quality, launched in early 2025. Designed for professionals managing quality throughout construction proj...
Central Limit Theorem Interactive Demo Central Limit Theorem Interactive Demo Controls Select parameters for the simulation Distribution Type Uniform Normal Bimodal Exponential Gamma Log-Normal Sample Size 1 3 5 30 100 Number of Runs 5 100 1000 Start...
Periodic Table of Quality Management Tools Periodic Table of Quality Management Tools An interactive guide to quality management tools organized by categories. Click on any element to learn more about the tool, its purpose, and related techniques. Th...
Quality management frequently involves critical decision-making, especially when evaluating multiple design solutions, improvement ideas, or alternatives. One powerful tool that simplifies and enhances this process is the Pugh Matrix, also known as t...
Section IV Renamed: Previously titled "Quality Concepts and Tools," Section IV is now "Quality Assurance and Improvement," reflecting a broader focus on quality enhancement strategies.Content Reorganization: The topic "Basic Statistics and Applicatio...
Quality management relies heavily on metrics and key performance indicators (KPIs) to monitor, control, and improve processes. However, a critical challenge arises when measures become targets. This phenomenon is captured by Goodhart’s Law, a princip...
In statistics, the shape of data distribution significantly impacts how data is interpreted and analyzed. Two important distribution shapes are left-skewed (negatively skewed) and right-skewed (positively skewed). Understanding their characteristics...
