This is one of my biggest complaints. There are studios, and there are 3br units, and everything in between. There are new features and older features that take more time to repair. 2 bathrooms take twice as long as one bathroom. Washers and dryers are two more appliances. There are full paints, touch up, and no paint at all. There are immaculate units and trashholes. There are apartments that look great and one little issue could lead to a major project. There is no "allowing for turn time". Each unit in each building is different and has different timelines.
With that said, I walk it making note of anything unusual , time consuming, or expensive, as well as any items that need upgrading, then housekeeping does their initial cleaning, then paint, then maintenance does their thing, then carpet, then housekeeping does the final wipe down. Then I walk it and ensure it's perfect.