Wal-Mart's Electronic Data Interchange (EDI) systems automate ordering and payment processes with suppliers, thereby reducing co
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Answer: c.) Yes, the process is in control.
Explanation:
For the process to be in control, the number of defects have to be between the Upper Control Limit and the Lower Control limits of the c-chart which can be used to measure defects of irregularities per unit.;
UCL = C-bar + z*√(c-bar)
LCL = C-bar - z*√(c-bar)
C - Bar =
C - Bar =
C - Bar = 4.375
z = 3 when using the 3 sigma control
UCL = C-bar + z*√(c-bar)
UCL = 4.375 + 3 * √(4.375)
UCL = 10.65
LCL = C-bar - z*√(c-bar)
LCL = 4.375 - 3 * √(4.375)
LCL = -1.9
LCL = 0 (Lower limit minimum should be 0 at least)
Defects are within the control limits. The process is in control.