MANAGEMENT PROGRAMME
Term-End Examination
June, 2005
MS51 : OPERATIONS RESEARCH
Time: 3 hours
Maximum Marks: 100
(Weightage 70%)
1 . (a) Express the linear Programming Problem in its general form with Matrix Notation. 10+15=25
(b) Solve the following LP - problem by SIMPLEX Method.
Minimize z = x1 - 3x2 + 2x3
subject to
3x1 - x2 + 3x3 ≤ 7
- 2x1 + 4x2 ≤ 12
- 4x1 + 3x2 + 5x3≤ 10
x1 ; x2 ; and x3 ≥ 0
2. Find the optimum solution for the following transportation problem. 25
From \ To | A | B | C | Total |
I | 1* | 2 | 3 | 50 |
II | 3 | 2 | 1 | 80 |
III | 4 | 5 | 6 | 75 |
IV | 3 | 1 | 2 | 95 |
Total | 120 | 80 | 100 |
*This is unit transportation cost.
3. (a) Explain the difference between pure strategy and rnixed strategy.
(b) In a game of matching coins with two players, suppose A wins one unit of value when there are two heads, wins nothing when there are two tails and loses 1/2 unit of value when there is one head and one tail. Determine PAY - OFF matrix, the best strategy for each player and the value of the game to A. 10+15=25
4. (a) Discuss the costs associated with queuing system. Also explain the concept of optimum servicing rate and optimum cost.
(b) In a railway marshalling yard, goods trains arrive at a rate of 30 trains / day. Assuming that inter - arrival time follows exponential distribution and the service time distribution is also exponential with average 36 minutes, calculate the following :
(i) Average number of trains in the yard.
(ii) Probability of queue exceeding 10.
(iii) Utilization rate of the yard. 10+15=25
5. (a) Write down the general form of Integer Programming Problem as LP.
(b) Explain the branch and bound method of solving Integer Programming Problem.
(c) Discuss the effect of "ROUNDING - OFF" a continuous optimal solution of an LP - problem to obtain an integer solution. 9+9+7=25
6. (a) Discuss the various Inventory Control systems.
(b) A manufacturer requires 15000 units of a part annually for assembly. Manufacturer can produce this at the rate of 100 per day. Set - up cost for each production run is Rs. 24 /-.To hold one unit of this part, inventory cost of manufacturer is Rs. 5 /- for a year: Assume 250 working days per year. Find out the economic batch quantity and economic run length. 10+15=25
7 . Write short notes on any two of the following : 25
(i) Goal Programming
(ii) Non - Linear Programming
(iii) Selective Inventory Control
(iv) Simulation
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