When there are relatively few criteria involved in assessing the solution options, it is best to focus on the differences of the solutions, as they are likely to have the most impact on the decision. Focusing on the commonalities, the life cycle costs, or the implementation costs may not provide enough information to distinguish the solutions and select the best one for the business need.Reference:BABOK Guide v3, section 10.4.3.2;CCBA Handbook, section 5.4.4.3.