Explicit, specific, measurable metrics. Tradeoffs, so have to pick relevant metrics. Analyze the financial impact of the usability of the system. 2, no. 3, July 1995, pp. The goal is to explore different design alternatives before one settles on a single approach that can be developed in further detail Each designer works independently Generate new combined designs by incorporating the best features from the independent designs Diversified parallel design each designer concentrates on a different aspect of the design problem e.g., novice vs expert users Important to perform parallel design in novel systems in which their is little information about what interface approaches work best Parallel design is a very cheap way of exploring the design space because most of the ideas will not need to be implemented, which might not be the cause if the design was explored later during iterative design Iterative Design Process Participatory Design Users involved in the design process through regular meetings.
Users are good at reacting to concrete designs and prototypes.
May need a centralized authority on each project to coordinate various aspects of the interface. Interface standards can also be used to promote consistency. Consistency can be increased through code re-use and or through a constraining development environment Guidelines and Heuristic Evaluation Evaluate your interface according to the guidelines. So don't need to keep revisiting the same decisions When future conditions suggest changing a decision will remember why made that way and what implications for change are. Instead of arguing about a design feature, figure out what information would tell you which way to go Experiment, marketing data, etc.