Source: Image of Smoker Ad, Public Domain http://depot.muratkahraman.net/post/267445368/smok... Image of Adjusted Smoker Ad, By Maria Tucker
Adjustment is the process of fixing any mistakes.
Collaboration is the process of having many participants working together on a project.
Prototype is a product that is ready for observation but not ready for distribution.
Refinement is a process of simplifying the project to its necessary attributes.