● Key users: They are critical to the continued success of the product. Give greater importance to requirements generated by this category of user.
● Secondary users: They will use the product,but their opinion of it has no effect on its long-term success. Where there is a conflict between secondary users’requirements and those of key users,the key users take precedence.
● Unimportant users: This category of user is given the lowest priority. It includes infrequent, unauthorized, and unskilled users, as well as people who misuse the product.
The percentage of the type of user is intended to assess the amount of consideration given to each category of user.