You just handed your car to be serviced, and you are waiting in their lounge for them to finish their work and hand it back to you. You don’t really know what is happening and how long it will take.
An app that both the mechanics and you use. The workers use it to signal what the plan of action is, where in the plan are they now (what specifically are they currently working on), and a schedule and finishing estimate for each step and the whole plan. You get to see (with alerts or by checking the app) where they are in the execution plan, and time estimations as to when they’ll finish.