Management Information Systems
In transportation model of O R once an initial solution has been found, the next step is to test that solution for optimality. The methods widely used for testing the solution are:

Modified Distribution Method
Slack variable method
Both of the above
None of these
Stepping Stone Method

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Management Information Systems
Computing systems most often facilitate planning because they:

All of these
make it possible to take into account many possibilities in an uncertain situation
None of these
make it possible to solve complex problems
enable an appropriate data processing system to provide answers quickly

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