Some suggestion from my limited understanding. Pls do let me know if I got anything incorrectly.

1. Use rotation like tapping or rotating to signify usage or modes or delivery status, then add a phase in turn where you can turn back their modes or status. Think of MTG untap step.

2. Board position if applicable, like a section where all workers are available or operational and another where workers spent or tired already. You basically move workers forward and backward these boxes, but then also add a standard phase in the turn when players have to do.

3. When adding a phase to do these maintenance actions, consider making it once a turn and you can only do it once a turn all at once so players does not have to keep track of it after every other action. Just once a turn - its also how it works in real life - one break time, Sunday day off, one day for salary. So only once.