Mein UKB

Mein UKB

Personal hospital companion for clinical services and treatment support

Usability Engineering

2024 - 2025

Universitätsklinikum Bonn

Featured in Publications

Bresser, L., Heinemann, M., Chaikevitch, P., & Jonas, S. (2025).

Development of a Patient-Centered App for an University Hospital: An Usability Engineering Approach. Studies in health technology and informatics, 327, 964-968.

Chaikevitch, P. (2025).

Usability Engineering for patient apps. adesso Blog.

Project profile

The University Hospital Bonn (UKB) is one of Germany’s leading medical institutions, providing comprehensive care and clinical research across a wide range of specialties. As part of the “Innovative Secure Medical Campus” (ISMC) digitalisation initiative, UKB set out to create a mobile solution that would make navigating hospital processes simpler, more transparent, and more patient-friendly. The goal was to empower patients and their relatives throughout the entire clinical journey - from referral to recovery - by giving them access to a broad spectrum of digital services and tools for self-managing medical matters.

Mission Statement

A patient with suspected bladder dysfunction receives a referral to the UKB. She looks up the address and finds a single one for all 60+ specialty clinics. She calls and reaches the wrong department. On the day of her appointment, she wanders across a campus with no central reception. She brought her medical records printed out because there was no digital way to share them in advance. After the appointment, she receives an inpatient admission date - by letter, three weeks later.


The UKB needed a digital patient portal - legally required by the KHZG, strategically intended as a leadership position in patient empowerment. But the real challenge was threefold: First, appointment mix-ups, manual document sharing, and disorientation on campus burdened clinical staff with avoidable administrative overhead. Second, siloed solutions already existed for each of these pain points - without integration, without a continuous patient journey. And third, the empirical foundation was missing: No one knew what patients across heterogeneous specialty clinics actually need.

BELFRY

MEDICAL COMPANION

MDR-compliant mobile Health App for a physical Medical Device

Product Design

2023 - 2024

Belfry Medical GmbH

as part of Sanity Group GmbH

Usability Engineering

2024 - 2025

Universitätsklinikum Bonn

Featured in Publications

Bresser, L., Heinemann, M., Chaikevitch, P., & Jonas, S. (2025).

Development of a Patient-Centered App for an University Hospital: An Usability Engineering Approach. Studies in health technology and informatics, 327, 964-968.

Chaikevitch, P. (2025).

Usability Engineering for patient apps. adesso Blog.

Belfry Medical specializes in controlled medical substance therapy through an advanced inhalation device, offering microgram-level precision dosing.


To improve treatment monitoring and help patients take control of their therapy, my team and I designed the user-centric Belfry Medical Companion App. This MDR-compliant mobile health solution offers full transparency throughout the treatment process, reduces the risk of addiction and misuse, and optimizes both outcomes and cost efficiency.


The Belfry Medical Companion supports responsible use of the cannabis inhaler by tracking device status, recording therapy data, and serving as a symptom diary. It logs usage history, provides timely reminders, and seamlessly links key inhaler functions to the user’s smartphone.

Mission Statement

Our team designed the Belfry Medical Companion App — a user-focused, compliant digital tool that provides patients with transparency and control over their therapy. By tracking device status, recording detailed therapy data, and offering a symptom diary, the app helps reduce the risk of addiction and misuse while optimizing treatment outcomes and cost efficiency. Features such as usage history, timely reminders, and smartphone-linked inhaler controls ensure patients can manage their therapy responsibly and with confidence throughout the entire treatment process.

A patient with suspected bladder dysfunction receives a referral to the UKB. She looks up the address and finds a single one for all 60+ specialty clinics. She calls and reaches the wrong department. On the day of her appointment, she wanders across a campus with no central reception. She brought her medical records printed out because there was no digital way to share them in advance. After the appointment, she receives an inpatient admission date - by letter, three weeks later.


The UKB needed a digital patient portal - legally required by the KHZG, strategically intended as a leadership position in patient empowerment. But the real challenge was threefold: First, appointment mix-ups, manual document sharing, and disorientation on campus burdened clinical staff with avoidable administrative overhead. Second, siloed solutions already existed for each of these pain points - without integration, without a continuous patient journey. And third, the empirical foundation was missing: No one knew what patients across heterogeneous specialty clinics actually need.

Project profile

Belfry Medical specializes in controlled medical substance therapy using an advanced inhalation device capable of microgram-level precision dosing. The company set out to complement this hardware with a digital solution that would enhance treatment monitoring, strengthen patient engagement, and support responsible therapy management. The goal was to create a mobile health application that not only integrates seamlessly with the inhaler but also meets strict MDR compliance standards for safety and reliability.

The University Hospital Bonn (UKB) is one of Germany’s leading medical institutions, providing comprehensive care and clinical research across a wide range of specialties. As part of the “Innovative Secure Medical Campus” (ISMC) digitalisation initiative, UKB set out to create a mobile solution that would make navigating hospital processes simpler, more transparent, and more patient-friendly. The goal was to empower patients and their relatives throughout the entire clinical journey - from referral to recovery - by giving them access to a broad spectrum of digital services and tools for self-managing medical matters.

Position and responsibilities

As Usability Engineering Lead and Art Director, I was responsible for the entire user-centered development process. Based on the contextual studies conducted by the Institute for Digital Medicine at the University Hospital Bonn, I orchestrated the translation of research findings into product strategy, requirements, and design - across a 5-person team of adesso designers and UKB researchers.


In the process, we condensed over 900 unstructured requirements from 7 clinically heterogeneous specialty clinics into 32 main tasks and designed 12 flows with over 200 screens from them. I was responsible for the strategic direction of the requirements process, the design of the patient journey architecture across 4 integrated systems, and the creative leadership from the first wireframe to the WCAG AA-compliant high-fidelity UI.

The Team

Team members obscured for data privacy reasons

Lead Usability Engineering

Requirements analysis and conceptualization

Creative strategy and Art Direction

Sr. UX/UI-Designer

Conceptualization & Interface Design

Sr. UI-Designer

Interface Design

Accessibility Consultant

Advisory on the scope of regulatory required measures

Sr. Researcher (UKB)

Research strategy and execution

Insight analysis

Sr. Researcher (UKB)

Research strategy and execution

Insight analysis

Sr. Researcher (UKB)

Research strategy and execution

Insight analysis

Accessibility Consultant

Advisory on the scope of regulatory required measures

Sr. UI-Designer

Interface Design

The Process

The development process followed a five-step approach that systematically aligned clinical stakeholder perspectives with real patient needs.


Step 1: Determine Clinical Context

In a 2-day workshop with UKB stakeholders, the clinical and economic project goals were clarified: What problems in daily clinical operations should the app solve? Which user groups are relevant? Initial assumptions about patient needs were formulated — as hypotheses to be validated in the field.


Step 2: Analyze Usage Context

The assumptions were tested through qualitative field research: 8 focus group discussions with medical staff identified the specific weaknesses in the treatment workflows of individual clinics. 2 workshops and 4 individual interviews with patients — methodologically based on User Story Mapping — captured the actual patient perspective.


Step 3: Validate Patient Journeys

The research findings were visualized as validated patient journeys — separately for outpatient and inpatient treatment paths. From the waiting list through appointment scheduling, the clinic visit, and inpatient admission to discharge and aftercare: Each step was linked to the concrete tasks and questions of patients in their daily clinical experience.


Step 4: Define Core and Sub-Tasks

From 277 collected implied needs, 141 requirements were specified and grouped into 48 core tasks. These were further condensed into 32 main tasks and 120 sub-tasks as the foundation for conceptualization and development. In parallel, validated personas were created for three care scenarios: outpatient, partial inpatient, and inpatient.


Key findings from the analysis phase were the following strategically critical insights:

Clinics are confused during appointment booking: Psychiatry or Psychosomatics? Uncertainty in clinic search created administrative overhead for staff and insecurity among patients.

Disorientation on campus: All clinics share the same address, there is no central reception — patients and family members often did not know where to go.

Treatment preparation takes place exclusively on-site: Patients received no information in advance and had no digital way to share documents with their physician.

Patients depend on family members: Severe limitations required that family members be able to take over administrative tasks on the patient's behalf.

Patients feel insufficiently informed: Time pressure on staff led to patients and family members perceiving treatment information as inadequate.


Step 5: From Requirements to Solutions

The 5 insights were translated into user-centered system requirements and directly shaped the design decisions: A diagnosis-based search function with visible consultation hours, integrated campus and indoor navigation, digital task management with document upload, family profiles with handover functionality, and structured clinic information pages. Four existing systems — Dedalus, condat, Arivo, and CA — were unified into a continuous patient journey, rather than existing as isolated modules.

Product Insights

Splash Screen & Onboarding

Three smartphones above each other
Three smartphones above each other

Home Dashboard

Smartphone standning behind medical cannabis inhaler

Appointment management

Woman with a smartphone in her hand
Woman with a smartphone in her hand

Family profiles

Smartphone in the hands of a user

On-campus Navigation

Smartphone in the hands of a user
Smartphone in the hands of a user

Task management

Key Details & Numbers

Project duration

4 months

1 month research & analysis

3 months concept & design

Creative Team led

6 designers / consultants

Professional clinics invoved

7

Specified core requirements

32

from 900 user needs

Methods

Requirements Extraction

Reviewed raw patient interview transcripts and workshop notes from six specialized clinics to identify every explicit and implicit requirement mentioned.

Key Task Consolidation

Merged and prioritized tasks across all groups to define 32 core tasks and 120 sub-tasks forming the foundation for the “My UKB” app design.

User Group Categorization

Organized all extracted requirements into groups based on the specific needs of different user types within the hospital ecosystem.

Task Assembly

Clustered related requirements within each user group into coherent tasks, reflecting real-world usage scenarios.

Software Stack

Figma

Confluence

as Quality Management System

Berlin, 2026.

All images are presented for portfolio and illustrative purposes only. They are not licensed for commercial use, reproduction, or distribution.

Berlin, 2026.

All images are presented for portfolio and illustrative purposes only. They are not licensed for commercial use, reproduction, or distribution.