The four stages of the ProDG are:
This refers to the various stages in which a product has to pass through before it is considered a finished product.
With this in mind, we can see that based on the ProDG model, the four stages which takes place is to define the program which is to be made, make the design, diagnose for possible errors and then deploy.
Read more about design process here:
https://brainly.com/question/24596247
