QUALITY SYSTEMS PROCEDUREStatistical Process Control 统计过程控制REFERENCES:(a) SPC User's Guide (b)STA-200 X(bar)-R(c)STA-300 Capability Studies1.0PURPOSE( 目的 ) To define the Statistical Process Control applications for our production inspect process.为了法律规范生产检验过程的SPC的控制。2.0SCOPE （范围） This procedure is applied to all the production part and process need to SPC control.本文件适用于公司内有SPC监控要求的所有产品及工艺。3.0 FUNCTIONS AFFECTED（涉及部门）Quality（质量部）Production （生产）Project （项目）Design （设计）Engineering （工程）Quality System （质量系统）4.0DEFINITIONS （定义） 4.1 The primary determinate in control chart selection is Data Type. 选择控制图最基本的决定条件是数据类型。4.1.1 Continuous data: the data from testing, for example: label dimensions.计量型数据: 通过测量得到的数据,如标签尺寸。4.1.2 Attribute data: the data from counting, the attribute data have two outcome (Pass/Fail, Good/NG).计数型数据: 通过点数得到的数据, 计数型数据只有两个值(合格/不合格, 通过/不通过)。4.2 Statistical Process Control(SPC): Using the statistical technology（control chart）for analyzing the stability of the process or output data，proper measure to reach and keep the statistical control status to improve the process ability.统计过程控制：使用统计技术（如控制图）去分析一个过程或输出数据的稳定性，实行适当的措施去达到和保持统计控制状态并改进过程能力。 4.3 Control of chart：The classical and effective tools to be used for reaching SPC control. 控制图：达到统计控制的典型和有效工具。4.4 Ability of control: The ability of process under the SPC can be confirmed, the data must be random, independent, and normally distributed.控制能力：只有过程在统计控制状态下才能被用于SPC控制，数据必须是随机，独立的和符合正态分布的。5.0PROCEDURE （程序） 5.1 Parametric choice： Quality engineer, Design ...
