Part A

What is the upper control limit for the R-chart?

Part B

Is the R-chart in control or out of control?

Part C

What is the upper control limit for the X-bar chart?

Part D

What is the lower control limit for the X-chart chart?

Part E

Is the X-bar chart in control or out of control?

QUESTION / What is the n value we should use to find the control chart factors from the following table: Size of Sample (n) Factor for UCL and LCL for X-Chart (A) Factor for LCL for R-Chart (D) Factor for UCL for R-Chart (D) 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 1.777 OOOO Source: Reprinted with permission from ASTM Manual on Quality Control of Materials, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. n=6 O n=3 n=5 n=4 QUESTION / What is the n value we should use to find the control chart factors from the following table: Size of Sample (n) Factor for UCL and LCL for X-Chart (A) Factor for LCL for R-Chart (D) Factor for UCL for R-Chart (D) 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 1.777 OOOO Source: Reprinted with permission from ASTM Manual on Quality Control of Materials, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. n=6 O n=3 n=5 n=4