目的: 用图形显示一系列分散的数据



差异: 制造出的产品和设计规格完全一致是最好不过了. 如果我们要生产一些直径规格一定的圆柱, 我们希望生产出的每一个圆柱都有相同的直径值. 但实际不是这样的. 每两个圆柱的直径都会有所不同. 差异也不是完全有害. 差异的一个特点是它展示一种规律, 一种分布. 这个规律可以帮助我们认识制造过程, 和制造过程中的问题. 柱状图可以帮我们认识这个规律.



柱状图: 柱状图是总结, 分析, 和显示数据的工具. 它用图形表现数值的分布, 把现象或测量数据归类, 并显示每类出现的频率.

-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.