Note: This chart is used when (2 Number of Appraisers 10)
The difference between the largest and smallest Appraiser average for each part.
The Average Range.
UCL , LCL (Upper and Lower Control Limit)
d3 is based on a subgroup size m = the number of Appraisers,
d2* is based on a subgroup size m = the number of Appraisers and g = the number of parts.
2. Table for d2* values may be found in A.J. Duncan, Quality Control and Industrial Statistics, 1965, Third Edition Richard D. Irwin, Homewood, Illinois. Table D3, pg. 910.