Don't assume that the job has been done. You now need to establish if the business needs have been met in terms of quantity and quality. If not, you need to revise your plans and take remedial action.
The business critical factor
Step 1 - Passengers, loads and additional features
Step 2 - Operating cycle
Step 3 - Vehicle efficiency
Step 4 - The drivers
Step 5 - Number of vehicles
Step 6 - Costs
Step 7 - Timing
Step 8 - Seek feedback