The user’s preferences, cognitive and physical abilities and limitations, living situation, tolerance for
technology, and probable changes in the future must be thoroughly assessed, analyzed, and quantified.
-Rehabilitation engineers will find that the highly descriptive vocabulary and qualitative language used by nontechnical professionals needs to be translated into attributes that can be measured and quantified. For example, whether a disabled person can use one or more upper limbs should be quantified in terms of each limb’s ability to reach, lift, and grasp