Clean water left standing for a couple of days can shift to Category 2, which changes what gets removed. That is the practical reason speed on day one matters.
Class matters just as much for the schedule. A Class 1 loss in one bathroom may dry in a couple of days, while Class 4 losses in hardwood, plaster or concrete need specialty setups and more time. Your restorer should spell out both ratings plainly and record them in the project file.
Managing Carrier, Contractor and Family
The project lead sends the adjuster updates, tracks approvals for each phase and tells you when the house will be livable again. On day one, ask who your single contact is and how often they will check in. If the answer is vague, that is worth noting.