Table 1.

Summary of clinical requirements linked to corresponding technology features/components

Objective and requirement	Performance indicator	VitalSeer feature/component implementation
Clinical adoptability by both healthcare professionals and patients	Continuous, high-accuracy vital sign estimations Confidence level information on assessment results	Automated offline pipeline to monitor model performance and benchmark assessment results Continuous confidence information display for the user on the application user interface (UI).
Clinical accessibility for the users	Operating System (OS) agnostic: compatible with the most common OS running on home devices (Windows, OSX, Linux, iOS and Android). Hardware/device agnostic: provides accurate assessment on consumer grade devices	OS Agnostic: avoids the use of any OS specific software component Hardware/device Agnostic: (1) outsource computationally-expensive processes to the server to maintain low requirements on users’ devices, (2) assess video quality and present assessment result with its associated confidence indicator (i.e. only displaying ultimate vital sign estimates to the patient or clinician on the UI), and (3) validate the inputs prior to performing a vital sign estimation using a quality metric.
User-friendliness/ ease of use and functional usability	User guidance for valid vitals assessment for optimal usability	Provide UI components that: (1) guide the user into properly positioning their face in the target area, and (2) automatically warn of any issue (e.g. getting off the target area), enabling optimal use of the system for the user without technical help.