Order Of Work
There is a big difference between processes that happen concurrently and those that can only happen consecutively. Planning for events can often mistake the two, and scheduled get crushed as a result.
In simple terms, two people can butter bread and slice cheese at the same time (concurrent), but you can’t cook the grilled cheese until all the parts are ready (consecutive).
Every project had points where things will slow down until a key point is passed. Plan for them.