Even if you're on the right track, you'll get run over if you just sit there. A project is a temporary endeavor undertaken to create a unique product or service. You have pulled together a team of musicians who will perform for you this evening. Well, in some ways this scenario may seem ridiculous.
Musicians expect to use sheet music when they are first learning to play a piece.
Most even keep the sheet music throughout the performances. You are in a business where every program is unique. It's no wonder that many customers want earplugs.