OPERATIONS AND SUPPLY CHAIN MANAGEMENT
9th Edition
ISBN: 9781119448037
Author: Russell
Publisher: WILEY
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Chapter 9, Problem 8P
A marketing firm is planning to conduct a survey of a segment of the potential product audience for one of its customers. The planning process for preparing to conduct the survey consists of six activities with procedure relationships and activity time estimates as follows:
- a. Determine all paths through the network from node a to node f and the duration of each, and indicate the critical path.
- b. Determine the earliest and latest activity start and finish times.
- c. Determine the slack for each activity.
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A marketing firm is planning to conduct a survey of a segment of the potential product audience for one of its customers. The planning process for preparing to conduct the survey consists of six activities, with precedence relationships and activity time estimates as follows: a. Determine all paths through the network from node a to node f and the duration of each. Also indicate the critical path. b. Determine the earliest and latest activity start and finish times. c. Determine the slack for each activity.
Humber Web Design Co. is organizing a new project to increase efficiency and improve relations with their clients. The project manager for this initiative has broken the project up into several parts as follows:
Activity
Activity Description
Immediate Predecessor
Activity time (days)
A
Identify Client Base
―
33
B
Develop Client Prospectus
―
21
C
Perform Design Analysis
―
35
D
Program Back End
A, B, C
47
E
Program Front End
A
13
F
Project Consolidation
D, E
11
(a) For the given project, fill in the nodes of the network diagram below.
A
E
33
13
Start
B
D
F
Finish
Time
21
47
11
Time
C
35
(b) Using the network diagram, fill in the table. Make sure that you put the values in the appropriate columns.
Activity
Earliest Start (ES)
Latest…
The table below contains scheduling data for a software development project to be undertaken in an IT company.
(i) Identify the critical activities and total duration for the project. (ii) Draw a network diagram using the Activity-on-Arrow (AOA) method to depict the flow of the activities showing interdependencies (iii) Using the data provided in the above table, create a float table for the project.
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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- Consider Table 6-3. All duration estimates or estimated times are in weeks, and the networkproceeds from Node 1 to Node 8. (Note that you can easily change this table to createmultiple exercises.)a. Draw an AOA network diagram representing the project. Put the node numbers in circlesand draw arrows from node to node, labeling each arrow with the activity letter andestimated time.b. Identify all of the paths on the network diagram and note how long they are, using Figure 6-8as a guide for how to represent each path.c. What is the critical path for this project and how long is it?d. What is the shortest possible time needed to complete this project?arrow_forwardThe project manager is working with his team in the planning stage for the construction of an industrial park. They are about to start with the network diagram. Which of the following items is NOT necessary for this process? A. Duration of activities B. Statement of project scope C. List of activities D. List of milestonesarrow_forwardDayagsky Construction Firm, Inc. will soon begin to work on a building for US tea that was initially started by another firm that has gone out of business. The construction firm’s schedule of activities and related expected completion time for US tea project are presented in the following time table: Activity Code Activity Description Estimated Time (in weeks) A - B Obtain on-site work permits 2 B – E Repair damages done by vandals 8 B – C Inspect construction materials left on site 1 C – E Order and receive construction materials 2 C – D Apply for waiver to…arrow_forward
- A contractor needs to complete a project. The project involves 10 activities (labeled A, B, ..., J) with precedence relationship in network below. The estimate (in weeks) of the duration of each activityis in the table below. a. The mean and variance of the activity time for A~F are given in the table. Find the mean and variance of the activity time for the remaining arcs.b. Identify the critical path and then compute the mean and variance of the project completion time.c. What is the probability that the project is completed between 32 and 36 weeks?d. What completion time should the contractor claims to be 95% sure of completing the project by then?arrow_forwardThe City of Rockland is planning to build a new fire station. A project manager and the project team have been selected. The project team is interested in selecting a project scheduling technique that will be used to complete the project. The criteria for the process of selecting the project scheduling technique has been established as follows: easy to use, and shows the following – task durations, milestones, flow of work, sequence of events, which tasks can be undertaken at the same time, and how far tasks are from completion. The City Manager favors the Gantt chart, the Fire Chief likes Program Evaluation and Review Technique (PERT), and the project manager prefers the Critical Path Method (CPM). Assume you are the project manager; which project scheduling technique would you choose? Discuss the rationale for your decision.arrow_forwardA toy manufacturing company is in the process of designing and subsequently launching a new toy. The process consists of seven activities with predecessor activity relationships and activity time estimates as follows: Activity Description Predecessor activity Duration (Weeks) A Design prototype - 2 B Build prototype A 3 C Order parts B 2 D Prepare for production B 4 E Prepare for marketing B 5 F Assembly and testing C, D 2 G Launch E, F 1 a. Draw the critical path diagram b. Determine the early start, early finish, late start, and late finish times c. Show critical path and determine its duration d. Determine the slack for each activityarrow_forward
- Identify the term being described for each of the following: (a). A sequence of activities in a project. (b). The longest time sequence of activities in a project. (c). Used when two activities have the same starting and finishing points. (d). The difference in time length of any path and the critical path. (e). The statistical distribution used to describe variability of an activity time. (f). The statistical distribution used to describe path variability. (g). Shortening an activity by allocating additional resources.arrow_forwardPERT NETWORK. A company is faced with the following PERT network situation (time in days): REQUIRED: Calculate (expected time) for each activity. For each activity, the estimates are , , , in that order. Calculate the total time for each path and identify the critical path.arrow_forwardA new project is to be completed. The following activities need to be completed in the order shown, where times are in weeks.A new project is to be completed. The following activities need to be completed in the order shown, where times are in weeks. (attached) You must use two decimal places at all times for expected times when they are not integer(a) Draw the activity network for this problem (b) Determine the Expected Times. (c) Determine the activity schedule (ES, EF, LS, and LF) as well as slack.(d) Determine and state the critical path for this project. (e) What are the expected time and the variance of the project? (f) What is the probability that the project is completed in 22 or fewer weeks. (g) What date should be set such that there is a 94% chance of completion within that time?arrow_forward
- We are the project manager for an IT project in our company. We identified the following top-level project tasks and estimated durations to standup a small test lab for the project: Identify test lab building/space requirements and possible locations(8days) Select best location for lab (1day) Once the best location is selected, immediately start the next two tasks: Prepare lab space with power and cabling (3days) Identify/procure required specialized test lab hardware/software(5) Once the lab space is prepared, install/check out available infrastructure hardware/software(1day). Once the specialized software/hardware is received and the infrastructure hardware/software is installed/checked out, install/checkout specialized software/hardware (2days) Once all tasks are completed, conduct the final inspection (1 day). Let's create a PERT/CPM chart for this project and identify the overall project duration and critical path.arrow_forwardActivity on Arrows : Questions1. Organize the information above in an activity precedence table.2. Draw an Activity-On-Arrow (AOA) network diagram representing information shown onthe activity precedence table.3. Show all different paths and their durationsarrow_forwardUse the following network and the data to perform the following: a) Prepare the manpower loaded Gantt chart with total floats of this project using early start and late times. Plot the manpower resource profile that shows the total number of laborers per day over the course of the project. Prepare the Gantt chart and the resource profile using the early start and finish dates of activities (not necessary to produce the late start and finish charts). b) Level the manpower resource given the constraint that the owner has only 14 workers to allocate to this project per day. Please try to do in excel. Thannksarrow_forward
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