Questions 9 to 10 deal with the case study below. A reconditioned copying machine at the paper plant can operate for seven days a week and 24 hours a day. Statistics recorded for the machine are as follows: Product changeovers Regular preventative maintenance No work scheduled Quality sampling checks Shift change times Maintenance breakdown Quality failure investigation Coating material stockout Labour shortages Waiting for paper rolls 20 hrs 16 hrs 8 hrs 8 hrs 7 hrs 18 hrs 20 hrs 8 hrs 6 hrs 6 hrs Should the machine not operate for 59 hours a week due to planned occurrences (unavoidable) and not for 58 hours due to unplanned stoppages (avoidable), what are the utilisation and efficiency ratios of the machine? Question 9 The design capacity is ... . 1.168 - 59 = 109 hours per week 2.168 - 59 - 58 = 51 hours per week 3.59 hours 4.24 hours x 7 days a week = 168 hours per week Question 10 The effective capacity is ... . 1.168 - 59 = 109 hours per week 2.168 - 59 - 58 = 51 hours per week 3.59 hours 4.24 hours * 7 days a week = 168 hours per week