Check This

• We have tested the usability of key tasks within our system.

• We have captured a conceptual model (perhaps using UML), which we have used, along with our understanding of the user 's mental model, to create a system metaphor.

• The system metaphor is readily apparent in the design and implementation of the system.

• We have agreed on the terms that define performance. We have provided a way for marketing and sales to estimate configurations.

• We know when and how to "throw hardware at the problem" and what will happen when we do!