The 7 QC (Quality Control) Tools are basic tools used for quality improvement and problem-solving in manufacturing, service, and other industries. They were popularized by Kaoru Ishikawa and are fundamental to Total Quality Management (TQM).
Here’s a quick overview:
1. Cause-and-Effect Diagram (Ishikawa or Fishbone Diagram) – Identifies root causes of a problem.
2. Check Sheet – Used to collect and analyze data; easy to use for tracking the frequency of events.
3. Control Chart – Monitors process variation over time and helps maintain control.
4. Histogram – Displays the distribution of data to show frequency patterns.
5. Pareto Chart – Based on the 80/20 rule; identifies the most significant factors in a dataset.
6. Scatter Diagram (Scatter Plot) – Shows relationships between two variables.
7. Flow Chart (Process Diagram) – Visualizes steps in a process for better understanding and analysis.