Operations Management – monitored with control charts.

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A shirt manufacturer buys cloth by the 100 yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g., loose threads and tears) the following data was collected from a sample provided by the supplier.

SAMPLE 1 2 3 4 5 6 7 8 9 10
IRREGULARITIES 3 5 2 6 5 4 6 3 4 5
________________________________________

Determine the , Sp, UCL and LCL for a c-chart with z = 2. (Round your answers to 2 decimal places.)

Sp = ___

UCL = ___

LCL = ___

________________________________________
Suppose the next five rolls from the supplier had three, two, five, three and seven irregularities. What is the UCL? (Round your answer to 2 decimal places.)

UCL = ___

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