individual steps in any process can be visualised in many ways.
Whilst these steps are not linear, there's a lot of cross-over between UX Design, Prototyping and Testing, this is one way of looking at the amount of effort for each step in the Process.
UX process breakdown
Iterate, Test, Iterate, Test…
Iteration around the prototyping phase whilst testing with end customers is vital to the ongoing success of any product. This can be achieved using a myriad of online tools and real world tasks nowadays.
Getting the product into the hands of the user is what we do, the clue is in the job title!