Suppose you are choosing among different product features with each feature adding a new functionality which has some utility but costs a certain amount. You have a fixed budget. You have five features for a vehicle for hauling cargo across large regions: Transportation. The usefulness of this feature is 100% but it does require training so it's usability is only 50%. Its appeal is limited so trained customers only have a 50% chance of using it. Multiply usefulness, usability and appeal to get its overall score. The cost of the feature is $3000