Final answer:
In the Lean UX process model, aside from a description and a benefit hypothesis, features should also contain 'acceptance criteria'. This set of conditions ensures that a feature is developed according to the user's needs and business goals, facilitating quicker iterations and user-centered design.
Step-by-step explanation:
Lean UX process model is a methodology that combines the principles of Lean Startup with the practices of user experience design. One key aspect of this model is the focus on features, each of which should include a description, a benefit hypothesis, and 'acceptance criteria'. Acceptance criteria are conditions that a product feature must meet to be considered completed and ensure that the feature has the desired functionality to meet user needs and business goals.
The process of Lean UX emphasizes rapid iteration and learning through the cycle of building a prototype, testing with users, and refining the design based on feedback. This approach helps teams to build a deep understanding of their users and to pivot or proceed with confidence that the product they are developing aligns with what customers want and need.