Instructions: Show complete works when answering all problems- don't just show final results. Otherwise, it will not be graded. Please do it by hand, but make it clear, neat and professional. Scan or take picture of your answer and upload it onto D2L dropbox before deadline. 1. BOD mini refrigerators are subjected to a temperature testing before they are sold to customers. Results from the last samples are shown in the table. Calculate and draw the necessary control chart(s) and determine whether the process is under control or not. If not, determine what the problem and what needs to be done. Sample # 1 Unit 2 Unit 4 30.8 31.3 w NP Unit 1 31.1 30.6 30.3 34.2 Unit 3 33.5 30.8 32.2 33.6 30.7 30.7 33.5 31 33.1 Unit 5 30 32.6 31.9 32.4 3 4 33.7 d. The firm decided to change to the periodic review (P) system to control the item's inventory. For the most recent review, an inventory clerk checked the inventory of this item and found 300 units. There were no scheduled receipts or backorders at the time. How many units should be ordered? (HINT: Use the EOQ model to derive P, the time between reviews.) Sample Size 2 3 000 w 5 6 7 Control Chart Constants A2 D3 1.880 0 1.023 0 0.729 0 0.577 0 0.483 0 0.419 0.076 0.373 0.136 0.337 0.184 0.308 0.223 D4 3.267 2.575 2.282 2.115 2.004 1.924 1.864 1.816 1.777 8 9 10