We use Production quality tools to understand problems and improve
 products, services, processes, reduce variation, and correct defects.
 They help us:
-  Collect reliable data instead of guessing.
-  Identify the most important problems.
-  Find the root causes of defects and mistakes.
-  Measure variation in a process.
-  Choose and test solutions.
-  Monitor results to ensure improvements continue.
-  Reduce waste, costs, and defects.
-  Increase customer satisfaction.
 
Production Quality Tools are
1.Check sheet - collects and counts data.
2.Cause-and-effect diagram - identifies possible causes of a
problem; also called a fishbone or Ishikawa diagram.
3.Histogram - shows the distribution and variation of numerical
 data.
4.Pareto chart - ranks problems from most to least important.
5.Control chart - monitors whether a process is stable over time.
6.Scatter diagram - shows the relationship between two
variables.
7.Flowchart - shows the steps in a process.
 
Other widely used methods include 5 Whys, 5S, FMEA, SPC, process mapping, benchmarking, and PDCA.