The User-Interface Prototyping practice is an effective remedy for feature creep when used with other practices. One study found that the combination of prototyping and JAD (Chapter 24) was capable of keeping creeping requirements below 5 percent. Average projects experience levels closer to 25 percent (Jones 1994).

User-Interface Prototyping interacts with either Throwaway Prototyping (Chapter 38) or Evolutionary Prototyping (Chapter 21), depending on which kind of user-interface prototype you develop.

Setting clear goals and objectives (Goal setting in Using the Top Five Motivation Factors) or using Miniature Milestones (Chapter 27) to monitor progress are important aids to keeping prototyping efforts focused.