
Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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Question 42
Given the activities, time estimates and dependency relationships:
|
|
Duration (days) |
||
Activity |
Predecessor |
Optimistic |
Most Likely |
Pessimistic |
A |
*** |
3 |
5 |
13 |
B |
*** |
4 |
7 |
10 |
C |
A |
5 |
7 |
15 |
D |
B |
8 |
9 |
22 |
What is the estimated slack time for activity A?
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4
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- PM.53 Sun Oracle is launching a new computer component. The team has broken the project down into activities, with the following durations: Activity Duration (weeks) Immediate Predecessor(s) A 15 В 8 C 15 A D E F 10 A,E 4 H 4 C,G What is the duration of the project? Number weeks What is the latest start week for activity C? Number What is the slack time for activity E? Number weeks f activity D were shortened by 3 weeks, what would be the new duration of the project? Number weeksarrow_forwardQuestion 1. a) Briefly describe what is meant by the term 'Work Breakdown Structure' (WBS), when applied to engineering project management. In particular, list the main components of a WBS and provide examples of typical structures commonly adopted by industry. b) Table Qla shows the logic for a particular project. Activity Precedence Time (days) A A 3 C A 2 A 4 E A F B,C G D 7 I 3 J G,H I, J 3 K Table Q1a. Logic for project activities A through K. (i) Construct a Network Diagram showing the various logical activity relationships from this information. (ii) Perform a forward and backward pass completing the activity boxes. (iii) Highlight the critical path on your diagram and state the earliest project completion time. 152NMMNarrow_forwardQUESTION 1 To complete the rotor assembly for an experimental spacecraft, Gilbert has laid out nine major activities involved. These activities have been labelled A to I in the table below, which also shows their estimated completion times (in weeks) and their immediate predecessors. EVENTS AND ACTIVITIES FOR ROTOR ASSEMBLY ACTIVITIES TIMES (IN WEEKS) PRECEDING EVENT А M A 1 2 3 3 4 A 4 6 A 8 9 10 A E 2 5 8 В В, С F, D Е, F Н, G 4 6 1 2 3 H 1 3 4 6 Key: A is optimist time, M is the most likely time and B is the pessimistic time. i. Calculate the expected time for each activity ii. Draw a Gantt Chart from the same information above iii. State the critical path and the maximum number of weeks the project will take to be completed. iv. Discuss the pros and cons of using the Gantt chart as a planning and scheduling tool?arrow_forward
- Question 2 The owner of a "Sweet Things Bakery” is considering a new computer system for accounting and inventory control. A computer company sent the following information about the system installation. Immediate Most Most Most Activity Predecessor Optimistic Likely Pessimistic A 2 3 4 B 2 3 10 C A 8 11 14 D A 3 13 17 E B 2 4 12 F C 4 5 18 G D, E 6 7 14 H F, G 6 9 18 (i). Determine the expected time and variance for each activity (ii). Draw the activity network for this project, showing the ES, EF, LS, LF and slack for each activity. (iii). State the critical path for the project. (iv). What are the expected time and variance of the project? (v). What is the probability that the project will be completed in 25 days? (vi). What completion time has a 98% chance of being met?arrow_forward2 Question 11 The relative criticality of various project risks are prioritized through A O Qualitative risk analysis Quantitative risk analysis O Identification of positive and negative risks Assumptions and constraintsarrow_forwardQuestion 100arrow_forward
- QUESTION 3 VP Manufacturers is considering renovating their offices at their Durban head office. (40 Marks) 3.1 Use the generated information to calculate the NPV of the project, to decide whether to go ahead with the project. (20 Marks) Investment required Expected economic lifetime Minimum required rate of return R200 000 5 years. 10% Net annual cash inflows 1st year 2nd year 3rd year R40 000 R100 000 R90 000 R40 000 4th year 5th year R30 000 3.2 VP Manufacturers has decided to go ahead with the project. The following activities has been determined for the office renovation project. Construct a network diagram (AON) to create a graphical description of the operations and their relationship to each other. Identity the critical path for the project. Task/Number Duration (Days) Predecessors A 12 B 8 A C 4 A D 7 C E 6 B. D F 7 E (20 Marks) QUESTION 4 (20 Marks) There is a need for an organisation to manage its human, cost, and technological resources effectively. Therefore, project…arrow_forwardQuestion 88arrow_forwardQuestion 1. Answer the following question based on the data from the data of a project in Table-1 Table 1: Project activities and durations Description Predecessors Build internal components Modify roof and floor Construct collection stack Pour concrete and install frame Build high-temperature burner Install pollution control system Install air pollution device Commissioning Activity P Q R S T U V W P, Q Q R, S T b) What is the total duration of this project? The total duration of this project..... T U Duration (days) 4 c) Identify the Critical Activities and Non-Critical Activities for this project. Critical Activities of this project......... Non-Critical Activities of this project. 4 6 10 6 5 3 a) Draw AON Network Diagram of this project and calculate the ES, EF, LS, LF and SLACKS of each activity. 5arrow_forward
- QUESTION 2 Three estimates were 15, 1, and 24, not given in any order. What is the Three-point estimate? Pick closest answer. O 13 14 O 15 O 28arrow_forwardTime estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (6²) A B C D Start a 31 44 48 22 m 40 50 60 31 B b 4574 49 56 72 34 D End 4) What is the estimated standard deviation of the expected time for the critical path? A. 2.83 days B. 5 days C. 8 days D. 20 days E. 25 daysarrow_forwardQUESTION 26 The following table of probabilistic time estimates (in weeks) and activity predecessors are provided for a project. Activity optimistic time most likely pessimistic time Activity Predecessor time 7 10 5 A B C D E Table 1 Reference: Ref 1 3 4 6 5 5 8 3 9 9 12 15 Using Table 1, how much slack is associated with activity C? OA. 12.67 weeks. B. 4.50 weeks. O C. 31.00 weeks. D.0 weeks. A A B, C Darrow_forward
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