ProblemSet3

# ProblemSet3 - Process and Systems Analysis BUS 351...

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BUS 351 Professor Diwas KC Homework 3 Posted: March 25, 2010 Table 1 Number of observations in subgroup (n) Factor for X- Bar Chart (A2) Factor for lower control limit in R Chart (D3) Factor for upper control limit in R Chart (D4) Factor to estimate standard deviation (d2) 2 1.88 0 3.27 1.128 3 1.02 0 2.57 1.693 4 0.73 0 2.28 2.059 5 0.58 0 2.11 2.326 6 0.48 0 2 2.534 7 0.42 0.08 1.92 2.704 8 0.37 0.14 1.86 2.847 9 0.34 0.18 1.82 2.97 10 0.31 0.22 1.78 3.078 1. P-Chart Problem Dominoes Pizza wants to develop a control chart to ensure new pizza delivery personnel are suited for the job. Delivery personnel must be able to read the destination address on a pizza label and deliver the pizza(s) within 30 minutes. From past records, the error rate for delivery personnel going to the wrong address is 7%. A random sample of 50 pizza orders is taken each week for a delivery person’s first 7 weeks on the job. Using the following data, construct a p- chart. Is this delivery person suited for the job? Week # Percentage Error

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ProblemSet3 - Process and Systems Analysis BUS 351...

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