1. 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 were collected from a sample provided by the supplier. Sample Irregularities 1 3 2 5 3 2 4 6 5 5 6 4 7 6 8 3 9 4 10 5 Total 43 a. Using these data, set up a c-chart with z = 3. b. Suppose the next five rolls from the supplier had three, two, five, three, and seven irregularities. Is the supplier process under control?
2. The hotel’s property management systems of today create a database of guest information. Please provide 3 different data items collected and stored in the PMS database, and describe how operations or sales/marketing can use this information.