One problem with cost-benefit analyses are the unknown-unknowns. Just because you have a cost-benefit model, it doesn't mean the model reflects the reality of y

One problem with cost-benefit analyses are the unknown-unknowns. Just because you have a cost-benefit model, it doesn't mean the model reflects the reality of your situation. There is a very real risk that much time is spent considering eventualities that can never occur, while ignoring all of the things that are actually happening.