We started with a work of ideation of potential solutions (how might we) that could be offered to users in terms of their two primary needs for oxygen therapy service: Orders and Use/Maintenance. For this purpose, two remote Design Sprints were carried out together with a Linde team formed especially for the project, with members from different LATAM countries.

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This phase ended with the creation of storyboards (high-level sketches) that reflected the flow of users on the platform, harmoniously incorporating the solutions/functionalities proposed by the team.

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From the storyboards we designed the screens of the platform for oxygen therapy users, following the main user flows.

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In Linde's case, the company already had a Design System. Taking it as a basis, we optimized it to make it more accessible, taking into account the characteristics of the platform's users (generally older people and sometimes in very nervous situations). From there, we created the graphic elements of the UI (buttons, menus, icons, images, etc.).

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We made the design for both the mobile (app) and desktop version, keeping the same functionalities but varying the layout of the interface elements. Finally, we prototyped all the central interactions of the screens.

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We validated the prototype by testing it with 10 users that met the characteristics of the platform's target user. Family members also participated in the testing since they would often be the main users of the platform.

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We used the technique of moderate remote Usability Testing, since we wanted to obtain qualitative data that would allow us to generate insights to make adjustments in the design of the prototype.

We used the insights obtained from the testing to make adjustments to the prototype. This allowed us to incorporate improvements and fix some usability bugs, achieving a better final version.

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In addition, we extended the user story map of the oxygen therapy user to include all possible scenarios on the platform. From this, we incorporated the missing additional screens (error screens, secondary functionalities, notification messages, etc.) into the prototype.

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With the prototype complete and the improvements implemented, we contact the development team and deliver all the documentation corresponding to the prototype including the design code base.

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Linde received as final deliverables:

• Complete prototype 100% navigable mobile version of the platform
• Complete prototype 100% navigable desktop version of the platform
• User flow of the entire platform
• Functional specifications of all screens

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