OPERATIONS AND SUPPLY CHAIN MANAGEMENT
9th Edition
ISBN: 9781119448037
Author: Russell
Publisher: WILEY
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Chapter 9, Problem 10Q
Which method for determining activity time estimates, deterministic or probabilistic, do you perceive to be preferable? Explain.
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Explain which method for determining activity time estimate, deterministic are they perceive to be preferable?
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A competitor of Kozar International Inc. has begun marketing a new, instant-developing film project. Kozar has had a similar product under study in its research and development (R&D) department but has not yet been able to begin production. Because of the competitor’s action, top managers have asked for a speedup of R&D activities so that Kozar can produce and market instant film at the earliest possible date. The predecessor information and activity time estimates in months are as follows:
Develop an activity schedule for this project using early and late start and finish times, compute activity slack time and define the critical activities.
Chapter 9 Solutions
OPERATIONS AND SUPPLY CHAIN MANAGEMENT
Ch. 9 - Why is CPM/PERT a popular and widely applied...Ch. 9 - What is the purpose of a CPM/PERT network?Ch. 9 - Why are dummy activities used in a CPM/PERT...Ch. 9 - What is the critical path, and what is its...Ch. 9 - What is slack, and how is it computed?Ch. 9 - How are the mean activity times and activity...Ch. 9 - How is total project variance determined in...Ch. 9 - What is the purpose of project crashing analysis?Ch. 9 - Describe the process of manually crashing a...Ch. 9 - Which method for determining activity time...
Ch. 9 - Explain how a Gantt chart differs from a CPM/PERT...Ch. 9 - Discuss the relationship of direct and indirect...Ch. 9 - Describe the limitations and disadvantages of...Ch. 9 - Describe the difference between activity-on-node...Ch. 9 - Identify and briefly describe the major elements...Ch. 9 - Select an everyday project you are familiar with...Ch. 9 - Prepare a WBS for a spaghetti with meatballs...Ch. 9 - Construct a Gantt chart for the project described...Ch. 9 - Construct a Gantt chart for the project described...Ch. 9 - Use the project activities that follow to...Ch. 9 - Construct a network from the information in the...Ch. 9 - For the network in Problem 9.4, determine the...Ch. 9 - Given the following network with activity times in...Ch. 9 - Given the following network with activity times in...Ch. 9 - A marketing firm is planning to conduct a survey...Ch. 9 - In one of the little-known battles of the Civil...Ch. 9 - A group of developers is building a new shopping...Ch. 9 - The management of a factory is going to erect a...Ch. 9 - Given the following network and probabilistic...Ch. 9 - The Farmers American Bank of Leesburg is planning...
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- Farihah is a project manager for a systems development project involving a new database application for her organization’s human resources department. Despite Farihah’s best efforts at estimating the time requirements for the project, the team has missed the deadline for completing the Analysis Phase and producing the System Proposal. Farihah had estimated during her 6-week Planning Phase that Analysis would require 2 months, but the team finished the System Proposal 2 weeks behind their planned target date. Based on her discussions with the team members, Farihah believes that the system is more complex than she originally thought. Should Farihah adjust her timeline, or can she try to make up for the lost two weeks? Farihah needs your advice.arrow_forwardThe manager of the Oak Hills Swimming Club is planning the club’s swimming team program. The first team practice is scheduled for May 1. The activities, their immediate predecessors, and the activity time estimates (in weeks) are as follows: Time (in weeks) Activity Description Immediate Predecessor Optimistic Most Probable Pessimistic A Meet with board ------ 1 1 2 B Hire coaches A 4 6 8 C Reserve pool A 2 4 6 D Announce Program B, C 1 2 3 E Meet with Coaches B 2 3 4 F Order Team Suits A 1 2 3 G Register Swimmers D 1 2 3 H Collect Fees G 1 2 3 I Plan first practice E, H, F 1 1 1 a) What is the critical path? b) What is the project expected time? c) What is the probability of completing in 13…arrow_forwardThe manager of the Oak Hills Swimming Club is planning the club’s swimming team program. The first team practice is scheduled for May 1. The activities, their immediate predecessors, and the activity time estimates (in weeks) are as follows: Time (in weeks) Activity Description Immediate Predecessor Optimistic Most Probable Pessimistic A Meet with board ------ 1 1 2 B Hire coaches A 4 6 8 C Reserve pool A 2 4 6 D Announce Program B, C 1 2 3 E Meet with Coaches B 2 3 4 F Order Team Suits A 1 2 3 G Register Swimmers D 1 2 3 H Collect Fees G 1 2 3 I Plan first practice E, H, F 1 1 1 b) What is the project expected time? c) What is the probability of completing in 13 weeks? d) What is the…arrow_forward
- A student club plans on holding a campus-wide event at the end of the semester. The activities that have to be completed, duration of each activity, and their sequence are listed in the table below: Duration Immediate Activity (weeks) Predecessor A 2 -- B 3 A C 1 A D 3 B E 4 D,C F 1 E b. What is the earliest start, earliest finish time, latest start, latest finish time for activity E? Earliest start time _______ Earliest finish time _______ Latest start time _________ Latest finish time ________ C What is the slack for Activity C? Slack for activity C ________arrow_forwardSUBJECT: SOFTWARE ENGINEERING For a particular project, consider following list of Activities, their duration in Days and their Predecessor Activity Days Precedents a 3 - b 15 A c 5 A d 60 A e 6 D f 40 B g 10 c, e h 7 F i 6 G j 12 h, i By using network schedule technique, draw a Network Diagram of above enlisted activities. Find Critical Path , earliest start, earliest finish , latest start and latest finish from Network Diagram.arrow_forwardOPERATIONS Duration and requirement of workforce for each activity is tabulated below for a network Activity Duration Number of men 1-2 3 5 2-4 2 3 2-3 3 7 3-4 0 0 3-5 3 2 4-5 7 2 3-6 2 1 5-6 6 6 4-6 5 5 Use either PERT or CPM to (i) Draw the network and comment on the scheduling of activities to smoothen the development of the workforce (ii) Re-schedule the activities for smooth development (iii) Find the project schedule if only 4 men are availablearrow_forward
- Analyze projects using network-planning models?arrow_forwardRead the following set of activities carefully. The precedence of all activities is finish to start. Using either ADM or PDM, perform the following tasks. Draw activity model Using forward pass, calculate earliest start and earliest finish for each activity Using backward pass, calculate latest start and latest finish of each activity. Determine float Represent Critical path on the activity network Complete the table showing all the information regarding each activity that has been acquired Activity # Activity Identifier Activity Duration Precedence 1 A 4 None 2 B 7 None 3 C 9 B 4 D 5 C 5 E 6 A, D 6 F 4 C, D, E 7 G 5 F 8 H 2 G 9 I 5 G, Harrow_forwardBased on past experience, Moss Company has developed the following budget formula for estimating its shipping expenses: Shipping costs = $21,000 + ($0.40 × pounds shipped). The company's shipments average 13 pounds per shipment. The planned activity and actual activity regarding orders and shipments for the current month are given in the following schedule: Plan Actual Sales orders 900 880 Shipments 900 920 Units shipped 9,000 10,000 Sales $ 130,000 $ 154,000 Total pounds shipped 10,600 13,300 The actual shipping costs for the month amounted to $26,000. The appropriate monthly flexible budget allowance for shipping costs for the purpose of performance evaluation would be:arrow_forward
- The manager of the Oak Hills Swimming Club is planning the club’s swimming team program. The first team practice is scheduled for May 1. The activities, their immediate predecessors, and the activity time estimates (in weeks) are as follows: Activity Optimistic Most Probable Pessimistic Immediate Predecessors A 1 2 3 - B 4 6 8 A C 2 4 6 A D 1 2 3 B, C E 2 3 4 B F 1 2 3 A G 1 2 3 D H 1 2 3 G I 1 1 1 E, H, F Draw a project network for this problem. Fill in all the blanks in the following table. Note: For variance (σ2) in activity time, keep two decimal places. Activity Expected Time t (weeks) Variance σ2 ES EF LS LF Slack Critical Path? A B C D…arrow_forwardThe manager of the Oak Hills Swimming Club is planning the club’s swimming team program. The first team practice is scheduled for May 1. The activities, their immediate predecessors, and the activity time estimates (in weeks) are as follows: Activity Optimistic Most Probable Pessimistic Immediate Predecessors A 1 2 3 - B 4 6 8 A C 2 4 6 A D 1 2 3 B, C E 2 3 4 B F 1 2 3 A G 1 2 3 D H 1 2 3 G I 1 1 1 E, H, F a. Draw a project network for this problem. b. Fill in all the blanks in the following table. c. What is the expected time and variance to complete the project? Note: For variance (σ2) in activity time, keep two decimal places. Activity Expected Time t (weeks) Variance σ2 ES EF LS LF Slack Critical Path? A B C…arrow_forwardDuration and requirement of workforce for each activity is tabulated below for a network Activity Duration Number of men 1-2 3 5 2-4 2 3 2-3 3 7 3-4 0 0 3-5 3 2 4-5 7 2 3-6 2 1 5-6 6 6 4-6 5 5 (i) Draw the network and comment on the scheduling of activities to smoothen the development of the workforce (ii) Indicate the maximum crew size in each case (iii) Re-schedule the activities for smooth development (iv) Find the project schedule if only 4 men are availablearrow_forward
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