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Maximal Assignment Problem

Sample Assignment Problem

A company has 5 tasks to be performed. The following matrix presents the return in terms of rupees on allotting ith ( i = 1, 2, 3, 4, 5 ) machine to the jth job ( j = A, B, C, D, E ). Assign the five jobs to the five machines in order to maximize the total expected profit.

 

 

Jobs

Machines

 

A

B

C

D

E

1

5

11

10

12

4

2

2

4

6

3

5

3

3

12

5

14

6

4

6

14

4

11

7

5

7

9

8

12

5

Answer

Subtract all the elements from the uppermost element

Highest element = 14

9

3

4

2

10

12

10

8

11

9

11

2

9

0

8

8

0

10

3

7

7

5

6

2

9

Row Reduced matrix

7

1

2

0

8

4

2

0

3

1

11

2

9

0

8

8

0

10

3

7

5

3

4

0

7

 

I Modified Matrix

2447_Maximal_Assignment_Problem_1.png

N < n i.e. 3 < 5

 

II Modified Matrix

39_Maximal_Assignment_Problem_2.png

N < n i.e. 4 < 5

 

III Modified Matrix

255_Maximal_Assignment_Problem_3.png

N = n

Zero assignment

1439_Maximal Assignment Problem_4.png

Optimal assignment 1 - C   2 - E   3 - D   4 - B   5 - A

Maximum profit = 10 + 5 + 14 + 14 + 7 = Rs. 50
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