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Q1 25P Assume you are working as a quality manager responsible for a number of manufacturing processes in a factory. You have been given the task of reviewing a statistical controlled quality system implemented. After looking into the operations of a machine a handful of operators are sure that the machine is running in a desired way and have then set up the chart. They have set up a SPC based on the sample system in tab 1 below (with 7 units in each sample, and sampled 10 times). Towards the end of the first week you are able to draw 2 new rounds of samples, each of them of seven products to send to a lab for quality inspections. The week after you receive the following result back (tab 2. below). Sample/ Product # #1 weight #2 #3 #4 #5 #6 #7 1 24 36 27 30 33 34 37 2 27 35 28 28 33 33 34 3 28 28 28 27 28 37 34 4 33 24 29 26 27 22 35 5 29 27 27 27 30 30 29 6 30 32 27 26 25 31 32 7 29 33 28 23 34 28 35 8 31 36 28 22 33 29 33 9 38 31 28 27 33 30 32 10 42 28 28 30 31 31 32 Tab 1 1 N 3 4 5 6 7 sample round 1 38 38 38 38 38 38 37 sample 41 36 27 28 33 20 25 round 2 Tab 2 1. a) Based on the data in tab 1 construct a suitable control chart with the typical 3 sigma limits which the operators have been using in the daily quality routines. 2. b) Is this SPC chart ok to use to monitor and control the process? 3. c) After this first week, is the process still running ok? 4. d) How would you apply the quality improvement procedure to investigate and improve this process? Provide arguments and justification for your suggested approach. Q1 25P Assume you are working as a quality manager responsible for a number of manufacturing processes in a factory. You have been given the task of reviewing a statistical controlled quality system implemented. After looking into the operations of a machine a handful of operators are sure that the machine is running in a desired way and have then set up the chart. They have set up a SPC based on the sample system in tab 1 below (with 7 units in each sample, and sampled 10 times). Towards the end of the first week you are able to draw 2 new rounds of samples, each of them of seven products to send to a lab for quality inspections. The week after you receive the following result back (tab 2. below). Sample/ Product # #1 weight #2 #3 #4 #5 #6 #7 1 24 36 27 30 33 34 37 2 27 35 28 28 33 33 34 3 28 28 28 27 28 37 34 4 33 24 29 26 27 22 35 5 29 27 27 27 30 30 29 6 30 32 27 26 25 31 32 7 29 33 28 23 34 28 35 8 31 36 28 22 33 29 33 9 38 31 28 27 33 30 32 10 42 28 28 30 31 31 32 Tab 1 1 N 3 4 5 6 7 sample round 1 38 38 38 38 38 38 37 sample 41 36 27 28 33 20 25 round 2 Tab 2 1. a) Based on the data in tab 1 construct a suitable control chart with the typical 3 sigma limits which the operators have been using in the daily quality routines. 2. b) Is this SPC chart ok to use to monitor and control the process? 3. c) After this first week, is the process still running ok? 4. d) How would you apply the quality improvement procedure to investigate and improve this process? Provide arguments and justification for your suggested approach