Answer :
The message 'Solver cannot improve the current solution. All constraints are satisfied.' from Solver typically indicates a local optimal solution has been found. A local solution represents the best solution in its immediate vicinity, not necessarily the best overall or global solution.
When Solver produces the message 'Solver cannot improve the current solution. All constraints are satisfied.', this typically indicates that Solver has found a local optimal solution (option A). This means that Solver has located a point where any minor variations in the parameters won't result in an improvement in the outcome. While this solution may not be the absolute optimal answer (the global optimal solution), it is the most optimal in its immediate vicinity.
Now, understanding the difference between a local optimal solution and a global optimal solution is essential. Global optimal solution refers to the overall best possible solution, whereas the local optimal solution is the best solution within a specific subset of the feasible region. In complex mathematical models, it can be challenging to determine the global optimal solution because of the large search space, and that's why Solver often finds the local optimal solution.
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