A good solution offers benefits that are far greater than the costs. Compare the list of costs to the list of benefits you identified from Step 3. Do the costs of building the new capital outweigh the benefits?

The answer to this question depends on the specific costs and benefits associated with building the new capital. Generally speaking, if the benefits outweigh the costs, then the solution is a good one. However, if the costs outweigh the benefits, then the solution may not be the best one.