Customer reviews and trial Software only when you reach the last step. If there is something that does not meet the requirements of the customer. Editing difficult too expensive, waste of time
Customers see and try the Software When the final step. If there is something that does not meet the needs of the customer to fix it is a waste of time.
Customers see the trial and Software. When they reach the final stage. If there is something that does not meet the needs of customers. Solving difficult, expensive, time.