Subject Code:2174002
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE- SEMESTER-VII (NEW) EXAMINATION — WINTER 2020
Date:21/01/2021
Subject Name:Construction Planning & Management
Time:10:30 AM TO 12:30 PM
Total Marks: 56
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Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
MARKS
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Q.1 (a) What are the construction management functions during the construction 03 phase of a project?
(b) Explain in brief: various life cycle phases of a typical construction 04 project.
(c) Explain the Project Work Breakdown Structure (WBS) in detail. Also 07 draw a typical WBS for a ‘Shopping Mall Construction Project’.
Q.2 (a) Explain various types of activity Floats in network diagram. How they are 03 evaluated?
(b) Draw a network diagram (AOA) for the following activities in a project. 04
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| Activities | IPA | Labors/day | Days(duration |
|---|---|---|---|
| A | -- | 5 | 3 |
| B | -- | 8 | 3 |
| C | A | 7 | 5 |
| D | B | 6 | 2 |
| E | C,D | 5 | 2 |
(c) Draw a network (AOA) from the following activities and find critical 07 path and duration of project.
| Activities | Duration (Days) | Activities | Duration (Days) |
|---|---|---|---|
| 1-2 | 5 | 5-9 | 3 |
| 1-3 | 8 | 6-10 | 5 |
| 2-4 | 6 | 7-10 | 4 |
| 2-5 | 4 | 8-11 | 9 |
| 2-6 | 4 | 9-12 | 2 |
| 3-7 | 5 | 10-12 | 4 |
| 3-8 | 3 | 11-13 | 1 |
| 4-9 | 1 | 12-13 | 1 |
Q.3 (a) Briefly outline the concept of various management techniques/tools for 04 scheduling construction projects. Mention the suitability of each.
(b) Enlist the major potential risk areas of a Construction site. 03
(c) Convert the following CPM network in to AON network. 07
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Q.4 (a) What are the limitations of the bar chart? 03
(b) Prepare a Health and Safety plan (HS plan) for a typical construction site 04 for a contractor to bid in pre-tendering process.
(c) Draw precedence diagram for the following data and find out critical path 07 and various floats. Lag/Lead relations are for a particular logical relation is given in brackets. Where ever explicit relations are not mentioned, it is F-S relations with zero lag/lead.
| Activity | A | B | C | D | E | F | G | H | |
|---|---|---|---|---|---|---|---|---|---|
| Predecessor | - | A[FS(1)] | B | B[SS(2)] | D | D,E | E | F[FF(4)],G | |
| Duration | 4 | 6 | 5 | 6 | 3 | 1 | 4 | 3 | 5 |
Q.5 (a) Enlist the cost associated for establishment of a typical construction site. 03
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(b) How resource levelling and resource allocation are different? Enlist the 04 general rules to be followed in resource levelling problems.
(c) A network is given below for a project. At the end of 10 days, following 07 information are available from site on the project status. Draw an updated network diagram using status report:
Activity D takes 6 days to finish.
Activity F takes 5 more days to complete.
It is expected that it will take total 15 days to finish activity B.
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Activity H cannot start until day 17 because of the delay of material.
Q.6 (a) What are the typical responsibilities of a contractor at a construction site? 03
(b) In the Q.2(b) network, allocate the resources based on the early start and 04 late finish times of the network.
Q7 (a) Explain the following terms:
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- Actual cost of the work performed (ACWP)
- Budgeted cost of the work scheduled (BCWS)
- Budgeted cost of the work performed (BCWP)
(b) Explain central limit theorem and how it is used in PERT problems.
(c) PERT Data for a project is given. Calculate the completion time of project with 50% probability.
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| Activity | IPA | Most Optimistic time | Most likely time | Pessimistic time |
|---|---|---|---|---|
| A | -- | 2 | 4 | 12 |
| B | -- | 10 | 12 | 26 |
| C | A | 8 | 9 | 10 |
| D | A | 10 | 15 | 20 |
| E | A | 7 | 7.5 | 11 |
| F | B,C | 9 | 9 | 9 |
| G | D | 3 | 3.5 | 7 |
| H | EF.G | 5 | 5 | 5 |
| i | j | Act | a | M | b |
|---|---|---|---|---|---|
| 5 | 10 | A | 2.00 | 4.00 | 6.50 |
| 5 | 15 | B | 6.00 | 7.00 | 7.50 |
| 5 | 30 | C | 1.00 | 2.00 | 5.50 |
| 10 | 20 | Y | 2.50 | 4.50 | 5.50 |
| 10 | 25 | U | 5.00 | 6.00 | 7.00 |
| 15 | 30 | I | 3.00 | 4.00 | 7.50 |
| 20 | 35 | O | 2.50 | 5.50 | 8.00 |
| 25 | 35 | P | 2.00 | 3.00 | 5.00 |
| 25 | 40 | L | 3.00 | 4.00 | 4.00 |
| 30 | 45 | K | 1.00 | 2.00 | 3.50 |
| 35 | 50 | J | 5.00 | 6.50 | 8.00 |
| 40 | 50 | H | 4.00 | 5.00 | 6.50 |
| 45 | 55 | G | 2.00 | 3.00 | 5.00 |
| 50 | 60 | F | 6.50 | 7.50 | 9.50 |
| 55 | 60 | D | 3.50 | 5.00 | 7.00 |
| 60 | 65 | S | 3.00 | 4.00 | 4.50 |
Q.8 (a) Explain the following in terms of Variance analysis:
- Cost Variance
- % Cost Overrun / Underrun
- % Time Overrun
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(b) Using resource aggregation method, schedule the project. sider no of gang as one for all the activities.)
| Activity | Duration (days) |
|---|---|
| A | 3 |
| B | 2 |
| C | 4 |
| D | 3 |
| E | 2 |
| F | 3 |
| G | 1 |
(c) The table given gives the data about duration and costs of various activity 07 of network shown in figure.
| Activity | Normal Duration (Weeks) | Normal cost (Rs.) | Crash Duration (Weeks) | Crash Cost (Rs.) |
|---|---|---|---|---|
| 1-2 | 5 | 4000 | 3 | 12000 |
| 2-3 | 6 | 3000 | 3 | 7500 |
| 2-4 | 8 | 3600 | 6 | 6000 |
| 3-4 | 5 | 5000 | 3 | 10000 |
The project overhead cost are Rs. 1500 per week. Find the optimum duration and the cost associated with it. Also, show the least cost and duration graphically.
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| Normal Deviate | Probability (%) | Normal Deviate | Probability (%) |
|---|---|---|---|
| 0 | 50.0 | 0 | 50.0 |
| - 0.1 | 46.0 | + 0.1 | 54.0 |
| - 0.2 | 42.1 | + 0.2 | 57.9 |
| - 0.3 | 38.2 | + 0.3 | 61.8 |
| - 0.4 | 34.5 | + 0.4 | 65.5 |
| - 0.5 | 30.8 | + 0.5 | 69.2 |
| - 0.6 | 27.4 | + 0.6 | 72.6 |
| - 0.7 | 24.2 | + 0.7 | 0. |
| - 0.8 | 21.2 | + 0.8 | 78.8 |
| - 0.9 | 18.4 | + 0.9 | 81.6 |
| - 1.0 | 15.9 | + 1.0 | 84.1 |
| =1.1 | 13.6 | + 1.1 | 86.4 |
| -1.2 | 11.5 | + 1.2 | 88.5 |
| - 1.3 | 9.7 | + 1.3 | 90.3 |
| - 1.4 | 8.1 | + 1.4 | 91.3 |
| - 1.5 | 6.7 | + 1.5 | 93.3 |
| - 1.6 | 5.5 | + 1.6 | 94.5 |
| - 1.7 | 4.5 | + 1.7 | 95.5 |
| - 1.8 | 3.6 | + 1.8 | 96.4 |
| - 1.9 | 2.9 | + 1.9 | 97.1 |
| - 2.0 | 2.3 | + 2.0 | 97.7 |
| - 2.1 | 1.8 | + 2.1 | 98.2 |
| - 2.2 | 1.4 | + 2.2 | 98.6 |
| - 2.3 | 1 | + 2.3 | 98.9 |
| - 2.4 | 0.8 | + 2.4 | 99.2 |
| - 2.5 | 0.6 | + 2.5 | 99.4 |
| - 2.6 | 0.5 | + 2.6 | 99.5 |
| - 2.7 | 0.3 | + 2.7 | L 4 |
| - 2.8 | 0.3 | + 2.8 | 99.7 |
| - 2.9 | 0.2 | + 2.9 | 99.8 |
| - 3.0 | 0.1 | + 3.0 | 99.9 |
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