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A company wishes to monitor the variation in the length of time it takes to process and send a bill to a customer. Seven bills will be randomly selected each day for a 60-day period and the length of time it takes to process and send the bill to a customer will be recorded for each bill. The appropriate control chart is a(n):
a. -chart.b. R-chart.c. p-chart.d. u-chart.

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TonieCee

Answer:

B. R-chart

Explanation:

An R-charts is used in monitoring the variation of a process, and it is based on samples that are taken from the process at given times , for example, hours, shifts, days, weeks, months, etc. In other words, an R-chart is a type of control chart that is used to monitor the process variability (for example the range) when measuring small subgroups (n ≤ 10) at regular intervals from a process.

R-charts are the most commonly used control charts for the process variation, because they are the simplest to calculate.

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