A shirt manufacturer buys cloth by the 100 yard roll from a supplier, for setting up a control chart to manage the irregularities (loose threads and tears) the following data were collected from a sample provided by the supplier. Sample               1 2 3 4 5 6 7 8 9 10 Irregularities        5 3 3 6 6 4 7 3 4 6   Determine the c, Sp UCL, for a c-chart with z= 2. Leave no blank. Round up any negative LCL value to 0 round to 2 decimals.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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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 (loose threads and tears) the following data were collected from a sample provided by the supplier.

Sample               1 2 3 4 5 6 7 8 9 10

Irregularities        5 3 3 6 6 4 7 3 4 6

 

  1. Determine the c, Sp UCL, for a c-chart with z= 2. Leave no blank. Round up any negative LCL value to 0 round to 2 decimals.
  2. Suppose the next five rolls from the supplier had 3, 2, 4, and 8 irregularities. Is the supplier process under control? Yes or no.
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