Treatment planning is where the dentist will arrange the procedures into a time frame. It is important to arrange a proper sequence of treatment.
Any treatment that is considered urgent will be scheduled first. The next phase of treatment will be to complete any necessary, but not urgent procedures. Restoration and re-construction phase will come next and finally a maintenance phase.
The complexity of treatment planning is not something customers usually have to worry about. It is a natural sequence of events that a dentist will work out as part of your treatment plan.