How a window replacement actually runs

What actually happens from the first visit to the finished window, and what gets decided when.

What Renewal by Andersen of Washington does

The window work Renewal by Andersen of Washington takes on: Replacement Only.

The windows they fit are Andersen.

In their own words: Full white glove service for custom window and doors.

Someone measures each window you want replaced. Width, height and depth, and whether the frame is square.
They check the condition of the frame and sill.
You go through styles, glass and hardware for each window. They do not all have to match.
You get a written price for the work as scoped. If the scope changes later, the price changes with it.

For illustration, not to scale.

The old frame is removed to the rough opening. A new frame, trim and flashing go in.