Table 2.

Results of the heuristic analysis and resulting software solutions (patient).

Heuristic categories	Patient interface issue	Patient interface solution
Visibility of system status	Users cannot tell how many questions remain in a survey	Quantify number of pages or questions remaining and show progress
Match between the system and the real worlda	Buttons are not representative of their function	Match the shape of buttons to function and add pictures to buttons
User control and freedom	Navigation to move backward and forward not clear	Optimize size, shape, location, and color of forward and backward buttons
Consistency and standards	Inconsistent labeling of PRO-CTCAEb symptom terms	Present labeling in consistent format
Error prevention	Small buttons close together, which increases the risk of selecting the wrong button	Increase size, labeling, and spacing of buttons
Aesthetic and minimalist design	Too many radio buttons in variable positions	Enlarge or enhance appropriate buttons; avoid open spaces and scrolling
Help users recognize and recover from errors	No help available	Create help documentationa
Disability accommodationsc	Radio buttons difficult to use; text too small	Create large target area for clicks and touch; make text larger and use easy-to-read font, and appropriate for color-blind individuals

^aDefined as functionality intuitively matching the intended function.

^bPRO-CTCAE: Patient-Reported Outcomes version of the Common Terminology Criteria.

^cItem is not part of standard traditional heuristics and was added for the specific needs of our patient population.