4. Given below are data for a lathe turning operation. The part is 15 cm long and has a target diameter of 60.000 mm ; 0.012. One measurement is taken at each end and three consecutive parts are measured every 30 min.

Construct a multi-vari chart and analyze the process.

The data are in deviations from the target of 60.000, thus 60.003 is coded 3 and 59.986 is coded -14.

Transcribed Image Text:

Time Part 1 Part 2 Part 3 0800 h -7/10 -2/13 9/18 0830 h 2/15 5/14 2/14 0900 h 0/14 3/15 -7/15 0930 h -231-5 -20/-6 -14/1