OPERATIONS RESEARCH >INTERNATIONAL EDITI
OPERATIONS RESEARCH >INTERNATIONAL EDITI
4th Edition
ISBN: 9780534423629
Author: WINSTON
Publisher: CENGAGE L
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Chapter 7, Problem 23RP

Explanation of Solution

Formulating a balanced transportation problem:

A balanced transportation problem is one in which the supply is equal to the total demand.

In the given problem, the variables are as follows:

  • Let the supply from plant 1 (number of units) to customer 1 be represented as p11, to customer 2 be p12, to customer 3 be p13 and to customer 4 be p14.
  • Let the supply from plant 2 to customer 1 be p21, to customer 2 be p22, to customer 3 be p23, to customer 4 be p24.
  • Let the supply from plant 3 to customer 1 be p31, to customer 2 be p32, to customer 3 be p33, to customer 4 be p34.

The objective is to maximize profit. Total profit can be represented by the below mentioned linear programming,

65*p11+63*p12+62*p13+64*p14+68*p21+67*p22+65*p23+62*p24+63*p31+60*p32+59*p33+60*p34

This is our objective function and we have to maximize it to gain maximum profit.

The constraints can be represented as follows:

i p11 + p21 + p31 = 4,000

ii p12 +p22 + p32 = 3,000

Total supply = 3000+5000+5000 = 13,000 units

In this customer 1 and 2 are using 4000+3000 = 7000 units

Units left = 13,000  7,000 = 6,000 units

iii p13 + p23 + p33 >= 3,000

iv p13 + p23 + p33 + p14 

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