SKEDSOFT

As there is no artificial variable in the programme, we can get the optimal solution for the givenproblem. Hence Phase II is:

Optimal solution is x = 4 and Z = Rs. 12/–.

The Disadvantages of Big M method over Two–phase method:

1. Big M method can be used to find the existence of feasible solution. But it is difficult and many a time one gets confused during computation because of manipulation of constant M. In two–phase method big M is eliminated and calculations will become easy.

2. The existence of big M avoids the use of digital computer for calculations.