Introduction - If you have any usage issues, please Google them yourself
Objective: graphic display of a series of scattered data differences: manufactured products and design specifications exactly the same is the best, but if we are to produce cylindrical diameter specifications, we hope to produce a cylindrical have the same diameter value, but actually not so. every two cylindrical diameter will vary. difference is not entirely harmful, a characteristic of the difference is that it demonstrate a law of a distribution, this law can help us understand the manufacturing process, and problems in the manufacturing process. histogram can help us to understand the law. histogram: histogram is to summarize, analyze, and display data tools. graphics performance value distribution, the phenomenon or measurement data are classified and display each class of the frequency of occurrence.