Comprehensive Midterm Assignment - Version 3 Your Name: Course Session: Answer the following four questions. Be sure to answer all parts of the questions thoroughly. (25 points each) 1. The following information is known about a project. a. Draw the network diagram for this project. b. Determine the critical path and project duration. c. Calculate the slack for each activity. Activity Activity (days) Immediate Predecessor(s) A 7 ---- B 2 A 4 A D B, C E D F E G E 4 4 3 5 Snipping Tool is 2. The manager of Perrotti's Pizza collects data concerning customer complaints about pizza delivery. Either the pizza arrives late, or the wrong pizza is delivered. Snipp Tool Problem Frequency Topping is stuck to box lid 17 Pizza arrives late 35 Wrong topping or combination 9 Try Snip & Sketch 6 Wrong style or crust Wrong size 4 Pizza is partially eaten 3 Pizza never arrives 6 a) Use a Pareto chart to identify the "vital few" delivery problems. Comment on potential root causes of these problems and identify any especially egregious quality failures. b) The manager of Perrotti's Pizza is attempting to understand the root causes of late pizza delivery and has asked each driver to keep a log of specific difficulties that create late deliveries. After one week, the logs include the following entries: delivery vehicle broke down, couldn't make it across town to deliver second pizza in time, couldn't deliver four pizzas to four different customers in time, kitchen was late in producing order, got lost, order ticket was lost in production, couldn't read address on ticket and went to wrong house. Organize these causes into a cause-and-effect diagram. 3. Rick DeNeefe, manager of the Golden Valley Bank credit authorization department, recently noticed that a major competitor was advertising that applications for equity loans could be approved within two working days. Because fast credit approval was a competitive priority, DeNeefe wanted to see how well his department was doing relative to the competitor's. Golden Valley stamps each application with the date and time it is received and again when a decision is made. A total 104 applications were received in March. The time required for each decision, rounded to the nearest hour, is shown in the following table. Golden Valley's employees work 8 hours per day. a) Draw a bar chart for these data. b) Analyze the data. How is Golden Valley Bank doing with regard to the competitive priority? Decision Process Time (hours) Frequency 8 8 11 19 14 28 17 10 20 25 23 4 26 10 TOTAL 104 4. The Big Black Bird Company produces fiberglass camper tops. The process for producing the tops must be controlled so as to keep the number of dimples low. When the process was in control, the following defects were found in 10 randomly selected camper tops over an extended period of time: Top Dimples 7 1 2 9 3 14 4 11 5 3 6 12 7 8 8 4 9 7 10 6 a) Assuming 10 observations are adequate for this purpose; determine the three control limits for dimples per camper top. b) Suppose that the next camper top has 15 dimples. What can you say about the process now