Creating a shortlist
Once the criteria have been created, bring out the list of solutions. Eliminate any solutions that do not match the must-have criteria that you and your partner identified. At the end of this process, you should have a small, manageable list of potential solutions.
You may find that there are no solutions left after this process. There are two options in this case. One is to re-evaluate your criteria and re-evaluate the solutions, to ensure there really are no options left. Another is to go back to the drawing board and work on additional solution ideas.