The way of presenting the functional requirements that a product must meet in order for it to be used by the user has been changed. Previously, the International Classification of Functioning, Disability and Health (ICF) was used, but its elaboration was complex and its understanding difficult, so a format that is easier to elaborate and understand has been chosen.
The requirements that the user must meet in order to use the product are presented in a two-column, multi-row table that includes the user's bodily functions. Each function is qualified with different levels according to the skill that is necessary to use the product:
- Null. The user can use the product despite lacking that function. The table cell has a white background color.
- Low. User can use the product with low skill level. The table cell has a light green background color.
- Medium. The user can use the product with medium skill level. The table cell has a pink background color.
- High. User can use the product with high skill level. The table cell has a dark red background color.
- - . The dash indicates that the function is irrelevant to the use of the product.