A factory producing wire mesh for fences wanted to test their mesh with respect to the key variable mesh tension. A tota
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A factory producing wire mesh for fences wanted to test their mesh with respect to the key variable mesh tension. A tota
a) Briefly explain the difference between the Establishment period and the Monitoring period. What specific tasks in control charting are performed during each period? b) Referring to the control charts above, are there any actions you would take during the establishment and monitoring periods?
Assuming the process is stable, the following capability analysis was produced: Process Capability Report for tension LSL Target USL Process Data LSL 225 Target 265 USL 300 Sample Mean 249.348 Sample N 150 St Dev(Overall) 10.3026 Overall Capability Pp 1.21 PPL 0.79 PPU 1.64 Ppk 0.79 Cpm 0.62 208 224 240 256 272 288 304 320 % USL % Total Performance Observed Expected Overall 0.67 0.91 0.00 0.00 0.67 0.91 c) Describe the capability of the process based only on the histogram above (hint: refer to the shape, target process mean, and the specification limits). d) What do the capability Ratio (Pp) and the Capability Index (Ppk) tell us about the capability of the process? Which measure would you use to determine whether the process was capable or not?