Concept explainers
A group of developers is building a new shopping center. A consultant for the developers has constructed the CPM/PERT network above and assigned activity times in weeks. Determine the earliest start and finish times, latest start and finish times, activity slack, critical path, and duration for the project.
Want to see the full answer?
Check out a sample textbook solutionChapter 9 Solutions
Operations and Supply Chain Management, 9th Edition WileyPLUS Registration Card + Loose-leaf Print Companion
Additional Business Textbook Solutions
Business in Action (8th Edition)
Operations Management, Binder Ready Version: An Integrated Approach
Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
Operations Management: Processes and Supply Chains (11th Edition)
Operations Management: Sustainability and Supply Chain Management (12th Edition)
Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
- The Farmer's American Bank of Leesburg is planning to install a new computerized accounts system. Bank management has determined the activities required to complete the project, the precedence relationships of the activities, and activity time estimates, as shown in the following table. Use POM- QM to analyze this project. According to the result of POM-QM, the expected project completion time is (type number only, no text) Activity a b C d C f 8 k Activity Description Position recruiting System development System training Equipment training Manual system test Preliminary system changeover Computer-personnel interface Equipment modification Equipment testing System debugging and installation Equipment changeover Activity Predecessor a a b, c b, c d, e d, e h f.g a 5 3 4 5 I 1 3 Time Estimates (weeks) 1 1 2 5 m 8 12 7 8 I 4 6 2.5 1. 2 8 b 17 15 10 23 1 13 9 7 1 2 11arrow_forwardThe table below show a set of activities of an IS project,its expected completion time (ET) and preceding activities. Activity Preceding Activity Expected Time (ET) A - 7 B A 9 C A,B 5 D C 17 E C 12 F C 7 G D,E,F 10 H D,G 7 Construct a network diagram ,and calculate its earliest completion time (TE), latest completion time (TL) and slack time (ST). If the activity E took 16weeks instead of 12weeks to complete ,what impact will it have on the project duration?arrow_forwardThe Industrial and Systems Engineering Department at Sun University is moving from its old building to a new building. The move must be completed within the 14-day period between semesters. A list of tasks (activities) has been prepared. The activities and precedence requirements are presented in the table below. Three time estimates (in days) are given for each activity: optimistic time, most likely time, and pessimistic time. (a) Perform a forward pass and backward pass through the network to determine the critical path, and the expected duration of the project (b) What completion time should the department specify in its proposal in order to be 85% sure that it will complete the project on time? Activity Activity description Immediate predecessor Optimistic time (days) Most likely time (days) Pessimistic time (days) 1 Initiate move - 0 0 0 2 Prepare new building space 1 2 4 6 3 Pack faculty files and books 1 3 4 5 4…arrow_forward
- Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: O Activity Time (weeks) Immediate Predecessor(s) Activity Time (weeks) Immediate Predecessor(s) E F A B C D Dave's earliest start (ES) and earliest finish (EF) are: 5 8 00 2 2 Activity HOT G ES Н EF 5 5 5 10 7 B B C, E D.Farrow_forwardA project has the activity duration and cost information indicated in the table where all times are in weeks. What is the total cost for completing this project in 50 days? Activity Predecessor Normal Time Normal Cost Crash Time Crash Cost A -- 8 $12,000 5 $21,000 B A 12 $20,000 9 $30,000 C A 15 $24,000 10 $60,000 D B 3 $10,000 2 $15,000 E C 9 $17,000 6 $34,000 F E 7 $5,000 6 $6,000 G D 8 $14,000 6 $20,000 H A 12 $22,000 10 $30,000 I H 6 $50,000 5 $55,000 J F, G, I 11 $33,000 9 $50,000arrow_forwardA political campaign manager must coordinate several activities to be prepared for an upcoming election. The following table describes the relationships among the activities that need to be completed, as well as the estimated times. Activity Immediate Predecessors Time (Weeks) A - 4 B - 6 C A 3 D A 4 E B, C 8 F B 7 G D,E 2 H F 1 Develop a project network for this problem. Determine the ES, EF, LS, LF, and slack time for each activity. Also determine the total project completion time and the critical path(s).arrow_forward
- Consider the project described in the table below: Activity Duration A B C D E F G H 9 4 8 8 5 7 4 6 OEST-9 and LCT = 15 OEST=9 and LCT = 13 Immediate Predecessor What is the earliest start time (EST) and latest completion time (LCT) of activity B? OEST=9 and LCT = 20 OEST-9 and LCT-17 - A A A B B,C C,D E,F,Garrow_forwardCrashed Completion time (week) Crashed Cost per Preceding Activity Normal Completion Time (week) Activity week A 7 5 $600 $700 $400 $800 12 10 A 8 2 D 9 7 E C, D 5 4 $300 F E 9 8 $500 G D, F 10 10 Find the minimum possible completion time of the project by considering the crashed completion times and the minimal total cost of that crashing the project. Highlight the critical and non-critical activities of the finally completed project by taking into account the crashed times of activities.arrow_forwardYou may need to use the appropriate technology to answer this question. A project consists of five activities as shown in the following table. Activity Floor sanding Floor buffing Paint mixing Wall painting Ceiling painting Start Optimistic Time (hr) Most Probable Time (hr) Start Floor Buffing Paint Mixing Naturally, paint mixing precedes the painting activities. Also, (a) Construct the PERT/CPM network for this problem. Floor Sanding 4 Paint Mixing 4 0.5 3 3 Paint Wall Paint Ceiling Paint Ceiling Paint Wall 5 5 1 4 7.5 Floor Sanding Pessimistic Time (hr) Floor Buffing Finish 6 Finish 6 ceiling painting and floor sanding must be dor 1.5 11 9 i Start Start prior to floor buffing. Floor Sanding Paint Mixing Floor Buffing Paint Mixing Paint Ceiling Paint Wall Paint Wall Paint Ceiling Floor Buffing Floor Sanding Finish Finisharrow_forward
- Construct a Gantt chart and project network for the following set of activities, compute the length of each path in the network, and indicate the critical path:arrow_forwardDave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: Activity Time (weeks) Immediate Predecessor(s) Activity Time (weeks) Immediate Predecessor(s) A 7 − E 5 B B 8 − F 6 B C 4 A G 11 C, E D 3 A H 7 D , F Part 2 Dave's earliest start (ES) and earliest finish (EF) are: Part 3 Part 4 Part 5 Part 6 Part 7 Part 8 Part 9 Part 10 Dave's latest start (LS) and latest finish (LF) are:…arrow_forwardPrepare a plan for a small project of moderate complexity (at least 12 activities, with some interdependencies between activities). Your plan should identify the activity by their beginning and ending nodes and by short, descriptive titles. Estimate the times to complete the activities. Prepare a PERT/CPM network. Determine critical path and the expected time for completing the project (Activity Analysis and Event Analysis). Choose a project of some personal interest and knowledge (e.g. building a house, selling a house, political campaign etc.) Your project will be judged by how completely it identifies all activities, the reasonableness of your time estimates and the correctness of your analysis. UPLOAD YOUR ANSWER HERE AS IMAGE/PDF.arrow_forward
- Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,Operations ManagementOperations ManagementISBN:9781259667473Author:William J StevensonPublisher:McGraw-Hill EducationOperations and Supply Chain Management (Mcgraw-hi...Operations ManagementISBN:9781259666100Author:F. Robert Jacobs, Richard B ChasePublisher:McGraw-Hill Education
- Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage LearningProduction and Operations Analysis, Seventh Editi...Operations ManagementISBN:9781478623069Author:Steven Nahmias, Tava Lennon OlsenPublisher:Waveland Press, Inc.