As a rule of thumb, your users / customers should spend the least amount of time possible trying to use your product or service, so they can spend the majority of their time enjoying it. (entrepreneur.com)
«The object is still to get the distance covered from start to finish in the least amount of time possible. (sbnation.com)
Some crying is inevitable as your baby learns to soothe herself but if you follow these guidelines she will cry the least amount of time possible. (sohoparenting.com)