Yes. In cases where estimating the month-to-month needs is hard to pin down because there are so many unknowns and variability in the situation, a pure hours-based engagement can be a wise move. Sometimes, a client has a list of projects to start with that we can estimate hours for, but we cannot be sure about the scope of without first “looking under the hood.” In those cases, we set an estimated hours commitment, but bill you by actual time spent on the project. This frequently can save the client money because we aim to be as efficient as possible. This also allows us to adjust the scope of the project on the fly without having to re-contract.