A First Course in Quality Engineering, 2nd Edition

Quality in Production—Process Control I 277

system is used in a generic sense to refer to an instrument, such as a caliper

or micrometer, or a system, such as that needed to measure the percentage of

carbon in steel� We use the terms instrument, gage, and measurement system

interchangeably� A brief discussion on measurement standards is provided

before the methods of evaluating measurement systems are described�

4.7.2 Measurement Standards

The standards for characteristics, such as length, weight, hardness, color,

and so on, are maintained by standards organizations of individual nations

and are called “national standards�” For the United ...