## Question Paper of CS 51 – Operations Research of June 2003 from IGNOU

1. a. Explain briefly any two of the following OR techniques: (6)

i. Linear Programming

ii. CPM

iii. M/< / ? queing model

iv. Dynamic Programming

b. Product Mix Problem: Give the Linear Programming formulation of the following problem:

The products A and B are produced in three machine centers X, Y and Z. Each product involves operation of each of the machine centers. The time required for each operation unit amount of each product is given below: Time available at machine centers X, Y and Z are 100, 77 and 80 hours respectively. The profit per unit of each of A and B is Rs. 12 and Rs. 3 respectively. (3) Read more…

## Question Paper of CS 51 – Operations Research of June 2002 from IGNOU

**Time**: 2 hours

Max. Marks: 75

Note: Question No 1 is compulsory. Attempt three more questions from questions numbered as 2 to 6.

Note: There are 6 questions in this paper. Question 1 is compulsory and carries 35 marks. From the remaining questions, attempt any two questions. Each of these carries 20 marks.

1. [15]

(a) Define the following terms very briefly, typically within one paragraph:

1. Dominance

2. Reasons for rising simulation

3. Safety Stock

4. Queue Discipline

5. Basic feasible solution Read more…

## Question Paper of CS 51 – Operations Research of June 2001 from IGNOU

**Time**: 2 hours

**Max. Marks**: 75

**Note**: Question No 1 is compulsory. Attempt three more questions from questions numbered as 2 to 6.

1.

(a) Enumerate six applications of Operations Research (OR) � 3 marks

(b) Discuss three major limitations of OR. � 3 marks

(c) Product Mix Problem: Give the Linear Programming formulation of the following program: The Product A, B and C are produced in three machine centers X, Y and Z. Each product involves operation of each of the machine centers. The time required for each operation for unit amount of each product is given below. Time available at machine centers X, Y and Z are 100, 77 and 80 hours respectively. The profit per unit of A, B and C is Rs. 12, Rs. 3 and Rs. 1 respectively.

Products Machine Centers

X � Y � Z Profit Per Unit

A 10 � 7 � 2 12

B 2 � 3 � 4 3

C 1 � 2 � 1 1

- 3 marks Read more…