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Construction Management - May 18
Civil Engineering (Semester 8)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
Activity | A | B | C | D | E | F | G | H |
---|---|---|---|---|---|---|---|---|
Preceding Activity | -- | A | A | B | B | C, E | D, F | C, E |
Duration (days) | 5 | 7 | 9 | 4 | 6 | 7 | 5 | 4 |
a) Draw a A-O-A network
b) Work out all activity times and floats
c) Identify the critical path and the project duration
Activity | A | B | C | D | E | F | G |
---|---|---|---|---|---|---|---|
Preceding Activity | ---- | ---- | A | A, B | C, D | E | C, D |
to (days) | 2 | 3 | 5 | 4 | 5 | 2 | 3 |
tm (days) | 4 | 5 | 7 | 7 | 9 | 4 | 6 |
tp (days) | 6 | 7 | 9 | 10 | 14 | 6 | 9 |
Z | -3 | -2 | -1 | 0 | 1 | 2 | 3 |
---|---|---|---|---|---|---|---|
P (%) | 0.13 | 2.28 | 15.87 | 50 | 84.13 | 97.72 | 99.87 |
i) Draw project network
ii) Find expected duration, standard deviation and variance of all activities.
iii) Calculate the project duration corresponding to 75% probability?
iv) What is the probability that the project will be completed 3 weeks earlier than the expected date?
Activity | Predecessor | Normal | Normal | Crash | Crash |
---|---|---|---|---|---|
Time (days) | Cost (Rs) | Time (days) | Cost (Rs) | ||
A | ---- | 9 | 8000 | 6 | 9500 |
B | ---- | 5 | 5000 | 3 | 5500 |
C | B | 7 | 6500 | 4 | 10500 |
D | A | 6 | 7000 | 4 | 10000 |
E | A | 5 | 4500 | 3 | 7500 |
F | D | 9 | 5500 | 5 | 9000 |
Activity | Duration | Labours |
---|---|---|
A (10-20) | 4 | 3 |
B (10-30) | 5 | 4 |
C (20-50) | 7 | 2 |
D (30-40) | 5 | 5 |
E (30-50) | 4 | 3 |
F (40-50) | 6 | 3 |
Draw Time scaled version network. Workout daily requirement of labours for all activities. Prepare histograms of EST & LST schedule. Which schedule you will prefer & why?
Year | 0 | 1 | 2 | 3 | 4 | 5 |
---|---|---|---|---|---|---|
Cash Flow (Rs) | 2,00,000 | 50,000 | 60,000 | 60,000 | 70,000 | 75,000 |
6. Write short note on (Any five) :