pg_0022

Process Improvement

5.2.

Assumptions

5.2.1.

Is the measurement system capable.

Metrology

capabilities

are a key

factor in most

experiments

It is unhelpful to find, after you have finished all the experimental

runs, that the measurement devices you have at your disposal cannot

measure the changes you were hoping to see. Plan to check this out

before embarking on the experiment itself. Measurement process

characterization is covered in

Chapter 2

SPC check of

measurement

devices

In addition, it is advisable, especially if the experimental material is

planned to arrive for measurement over a protracted period, that an

SPC (i.e., quality control) check is kept on all measurement devices

from the start to the conclusion of the whole experimental project.

Strange experimental outcomes can often be traced to `hiccups' in the

metrology system.

5.2.1. Is the measurement system capable.

http://www.itl.nist.gov/div898/handbook/pri/section2/pri21.htm [5/7/2002 4:01:43 PM]