Standard No.:	GB/T 18779.4-2020
English Name:	Geometrical product specifications (GPS)—Inspection by measurement of workpieces and measuring equipment—Part 4:Background on functional limits and specification limits in decision rules
Chinese Name:	产品几何技术规范（GPS） 工件与测量设备的测量检验 第4部分：判定规则中功能限与规范限的基础
Chinese Classification:	A52    Length Measurement
Professional Classification:	GB    National Standard
ICS Classification:	17.040.01 17.040.01    Linear and angular measurements in general 17.040.01
Source Content Issued by:	SAMR; SAC
Issued on:	2020-12-14
Implemented on:	2021-7-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	8500 words
Translation Price(USD):	255.0
Delivery:	via email in 1~3 business day

本部分规定了在GB/T 18779.1中理论理想判定规则下的主要假设。给出了这些规则应是缺省规则的原因，以及在运用不同判定规则前应考虑的因素。
本部分适用于GPS通用标准（见GB/T 20308）中涉及的所有规范，即由SAC/TC 240编制的标准，包括工件规范（通常以规范限形式给出）和测量设备规范（通常以最大允许误差形式给出）。