Assignment: # 01 (Spring-2012)
Mth601 (Operations Research)
Lecture: 04– 10
Total Marks = 30
Due date: 16th April, 2012
INSTRUCTIONS
Please read the following instructions before attempting to solve this assignment
1. In order to attempt this assignment you should have full command on
Lecture # 04 to Lecture # 10
2. Try to get the concepts, consolidate your concepts and ideas from these questions
which you learn in Lecture # 04 to Lecture # 10
3. You should concern recommended books for clarify your concepts as handouts
are not sufficient.
4. Try to make solution by yourself and protect your work from other students. If we
found the solution files of some students are same then we will reward zero marks
to all those students.
5. You are supposed to submit your assignment in Word format any other formats
like scan images, PDF format etc will not be accepted and we will give zero
marks to these assignments.
Assignments through e-mail are not acceptable after due date (If there is any problem in
submitting your assignment through LMS, you can send your solution file through email
with in due date). You are advised to upload your assignment at least two days before
Due date.
Question-01
A manager notes that when his clerk uses the telephone, he takes no less than 10
minutes for a call and sometimes as much as one hour. Twenty minutes calls are more
frequent than calls of any other duration. If clerk’s phone call were an activity in a PERT
project:
i) What would be the phone call’s expected duration?
ii) What would be its variance?
iii) In scheduling the project, how much time would be allocated for the phone call?
Solution:
Here
Optimistic Time = t0 =10 min
Most likely Time = tm = 20 min
Pessimistic Time = tp =60 min
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