CDAS Concept

Early 2020·Projects·5 minutes read
What workedWhat didn't work

CDAS Concept

CDAS is built for letting people to make hospital appointments easier and faster. This case study analyses and tries to provide solutions to observed issues.

Project Overview

Role: UX/UI Design
Platform: iOS and Android
Duration: 2 Weeks

The Problem

Context

Turkey's hospital appointment system, CDAS, serves millions of users but suffers from usability issues that create frustration and barriers to healthcare access.

Pain Points

  • Confusing Navigation: Users struggle to find available doctors and appointments
  • Poor Error Handling: "There is no appointment at the moment" messages are discouraging
  • Accessibility Issues: Low contrast ratios and unclear visual hierarchy
  • Complex Workflows: Appointment booking requires too many steps

Impact

These issues result in poor user satisfaction, increased support calls, and reduced healthcare access for vulnerable populations.

The Solution

Approach

We redesigned the entire user experience with a focus on clarity, accessibility, and user empowerment.

Key Decisions

  • Simplified Navigation: Reduced complexity and improved information hierarchy
  • Better Error States: Helpful messaging that guides users to solutions
  • Enhanced Accessibility: Improved contrast ratios and component recognition
  • Streamlined Workflows: Reduced steps while maintaining functionality

Implementation

The solution was prototyped and tested with real users to ensure effectiveness.

Design Process

### 1. User Research - Cognitive Walkthrough - Think Aloud Sessions - Gather User Comments
### 2. Defining Problems - Affinity Mapping - Pain Point Analysis - User Journey Mapping
### 3. Ideation - Wireframes - High Fidelity UI's - Interactive Prototypes
### 4. Testing - Design Validation - User Testing - Iteration

User Research & Problem Definition

User Research Analysis User Research Analysis: Understanding user pain points and behaviors

Problem Mapping Problem Mapping: Identifying key issues in the current system

Accessibility Issues Accessibility Issues: Visual and interaction problems

User Pain Points User Pain Points: Specific frustrations and barriers

Design Solutions

Family Doctor Appointment Flow

![Family Doctor Referral](/images/articles/projects/cdas-concept/Aile-Hekimi-Yonlendirme.png) **Family Doctor Referral: Simplified referral process**
![Time Selection](/images/articles/projects/cdas-concept/Aile-Hekimi-Saat-Secimi.png) **Time Selection: Clear appointment scheduling**
![Appointment Confirmation](/images/articles/projects/cdas-concept/Aile-Hekimi-Randevu-Onayi.png) **Appointment Confirmation: Success feedback**

Doctor Appointment Process

![Appointment Listing](/images/articles/projects/cdas-concept/Randevu-Listeleme-1.png) **Appointment Listing: Available appointments display**
![Clinic Selection](/images/articles/projects/cdas-concept/Klinik-Secimi.png) **Clinic Selection: Easy clinic and doctor selection**
![Time Selection](/images/articles/projects/cdas-concept/Randevu-Saat-Secimi-2.png) **Time Selection: Intuitive time slot selection**
![Appointment Confirmation](/images/articles/projects/cdas-concept/Randevu-Onayi.png) **Appointment Confirmation: Clear confirmation process**

Enhanced User Experience

Successful Appointment Successful Appointment: Positive completion feedback

Navigation Drawer Navigation Drawer: Improved navigation structure

Past Appointments Past Appointments: Appointment history management

Accessibility Improvements

Accessibility Enhancements Accessibility Enhancements: Better contrast and readability

Interactive Prototypes

Homepage Experience

**Homepage Experience: Main navigation and user flow**

Hospital Appointment Flow

**Hospital Appointment Flow: Complete appointment booking process**

Family Doctor Appointment

**Family Doctor Appointment: Streamlined family doctor booking**

Navigation Journey

**Navigation Journey: Improved menu and navigation experience**

Outcome

First Change: Improved User Experience

What worked

The redesigned interface significantly improved user satisfaction and reduced appointment booking time. Users reported feeling more confident and less frustrated when using the system.

Second Change: Enhanced Accessibility

What didn't work

While accessibility improvements were implemented, some users with specific needs still found certain interactions challenging. This highlighted the need for more comprehensive accessibility testing.

Key Learnings

Doctor Illustration Doctor Illustration: Representing the healthcare context

Design Principles

  • Clear Communication: Crucial in healthcare applications where clarity saves time and reduces stress
  • Helpful Error States: Error messages should guide users to solutions, not discourage them
  • Accessibility First: Design for all users from the beginning, not as an afterthought
  • User Feedback: Invaluable for understanding real pain points and validating solutions

Impact

This concept demonstrates how thoughtful UX design can transform essential public services, making them more accessible and user-friendly while maintaining the functionality required by complex healthcare systems.

CDAS is a trademark of Republic of Turkey Ministry of Health, registered in Turkey. Apple and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries and regions. All rights belongs to owners.