SUBJECT - OPERATIONS MANAGEMENT

** Please solve all three question. Please provide handwritten solution. If you provide wrong solution then i will downvote you.**

4. a. Develop a list of activities and their immediate predecessors similar to the lists in this problem for this diagram: A E F b. Construct an activity-on-arrow precedence diagram for each of the following cases. Note that cach case requires the use of a dummy activity. c. Construct an AON diagram for cach case. Immediate Predecessor (2) Activity Immediate Predecessor (1) Activity A J K B L J D A M L E N J mm F N G C 0 H F R K 1 s 0 K F G DE H,1,K V RST 0 End T W T M, P.V. W End 2. National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Jun. Month Sales (000 units) Feb. 19 Mar. 18 Apr. 15 May 20 18 Jul. 22 Aug. 20 a. Plot the monthly data on a sheet of graph paper. b. Forecast September sales volume using each of the following: (1) The naive approach (2) A five month moving average (3) A weighted average using .60 for August, .30 for July, and 10 for June (4) Exponential smoothing with a smoothing constant equal to 20, assuming a a March forecast of 19(000) (5) A linear trend equation c. Which method seems least appropriate? Why? (Hint: Refer to your plot from part a.) d. What does use of the term sales rather than demand presume? 4. The following information pertains to telephone calls to a motel switchboard on a typical Tuesday. Incoming Rate Service Rate (calls per (calls per minute Number of Period minute) per operator) Operators Morning 1.8 1.5 2 Afternoon 2.2 1.0 3 Evening 1.4 0.7 3 a. Determine the average time callers wait to have their calls answered for each period and the probability that a caller will have to wait for each period. h. For each case in the previous problem, determine the maximum line length for a probability of 96 percent