The 7 QC (Quality Control)  tools are simple graphical  and statistical tools that are  used for:
- Problem Solving
- Process Improvement
We need 7 QC Tools for:
- Analysing & Solving Quality Problems – making decisions & judgments
- Process Improvement
- Identifying real root cause of the problem
- Monitoring & Controlling Process Variations
- Continual improvement in products, Â processes, and services.
- To improve Quality, Productivity, and to  enhance Customer Satisfaction.
