Better control the waiting time of customers

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Reference no: EM131775824

The Department of Motor Vehicles wanted to understand and better control the waiting time of customers of the drivers license office. To do this, they constructed X-bar and R-charts by sampling the waiting times of the first five customers at the beginning of each shift (7 a.m., 12 p.m., and 3 p.m.). How might the sampling process be improved, and what would you recommend?

Reference no: EM131775824

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