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Statistical Process Control Transactions

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Token thickness and Bank transaction problem to excel worksheet.

A bank has determined that an average transaction time of sixty seconds with a variation of plus or minus five seconds for automated teller machines (ATM's) is expected. A survey shows the following transaction times.

Day Time in Seconds
M 63 55 56 53 61
T 60 63 60 65 61
W 57 60 61 65 66
TH 58 64 60 61 57
F 79 68 65 61 71
M 55 66 62 63 56
T 57 61 58 64 55
W 58 51 61 57 66
TH 65 66 62 68 67
F 73 66 61 70 72

a. Calculate the process mean.
b. Calculate the average range.
c. Calculate the process control limits for the process mean and the range.
d. Calculate the process capability index (Cp; PCI).
e. Calculate the CpK for the process.
f. Determine if the process is capable and in control.

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Statistical process control transactions are examined in the solution.

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A bank has determined that an average transaction time of sixty seconds with a variation of plus
or minus five seconds for automated teller machines (ATM's) is expected. A survey shows the
following transaction times.
Day Time in Seconds
M 63 55 56 53 61
T 60 63 60 65 61
W 57 60 61 65 66
TH 58 64 60 61 57
F 79 68 65 61 71
M 55 66 62 63 56
T 57 61 58 64 55
W 58 51 61 57 66
TH 65 66 62 68 67
F 73 66 61 70 72

For X chart For R Chart
Sample Average Range Standard Deviation Grand Mean X UCL LCL Mean ...

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