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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Data collection and JOLO refinement flow divided into two phases, each with two iterations. From each usability test session, invaluable information was derived that was implemented in the design of the prototype that followed it.