At a glance

The One.ERP project — one of the largest European SAP projects in the healthcare sector — optimizes processes and merges numerous systems for the Vienna Municipal Clinics (WSK) and the General Hospital of the City of Vienna (AKH).


  • Merged complex SAP systems of different public healthcare organizations
  • Standardized green field SAP S/4HANA system and automation
  • Optimized processes and future proof foundation
  • Improved healthcare system controls and user experience with SAP Fiori mobile solution

The project was under considerable time pressure due to its high complexity in combination with the planned use of the new technology SAP S/4HANA and a very ambitious project planning.
Only with very experienced and perfectly coordinated SAP consultants was this achievement successfully realizable.

Herwig Wetzlinger | Deputy General Director, Vienna Healthcare Association

Unlocking system complexity for population wellbeing

Following the initial planning, WiGeV commissioned Eviden and its strategic partner CGM to implement the One.ERP project in 2018. This aimed to implement a uniform and standardized SAP S/4HANA greenfield system to consolidate and harmonize two legacy SAP ERP systems and environments. One was the independently operational system for core processes of the Vienna Municipal Clinics (WSK). The other was for the General Hospital of the City of Vienna (AKH). Various systems in their respective IT landscapes were also included.

As a digitalization expert, Eviden was responsible for the end-to-end implementation. This entailed implementing all SAP modules, including pharmacy management (APM), catering management (VPM) and the SAP Fiori mobile solution. Eviden managed the entire project lifecycle, from analysis to implementation and commissioning to the hypercare phase.

Committed to smooth implementation

One.ERP was implemented by more than 400 employees of WiGeV and contractors from around the world acting as one team. Involving more than 23 departments in a range of medical specialist areas, this program was divided into 13 sub-projects. The standardization of more than 100 external application interfaces added to the complexity of the program.

Through the implementation of an innovative cost unit accounting system for hospitals, WiGeV now has a highly effective control tool in its hands, a unique feature in Europe.

Following the completion of the trial operation, the modern high-performance IT solution now ensures a high level of efficiency through mobile logistics processes and facilitates the cooperation of different company divisions and departments.

After go-live in January 2021, Eviden has been responsible for its system maintenance, and will continue to leverage innovations, enabling the association to react flexibly and quickly to future changes. In addition to standardization, the processes for presenting the asset, financial and earnings situation ensure future security and development capability.

Harmonized for adaptation

The success of One.ERP is underpinned by four pillars: standardization, transparency, efficiency and quality. With that, One.ERP serves as a future-oriented foundation to build new functionalities on top of a standardized system.

Why Eviden

Eviden is an SAP Global Partner with 35 years of SAP partnership delivering business value through digitalization of the entire business and IT landscape. Being one of main global Value Added Reseller (gVAR) Partners of SAP, our comprehensive portfolio of innovative solutions based on SAP technology enables us to drive intelligent enterprise transformation for our clients.

The Client

The Wiener Gesundheitsverbund (WiGeV), or Vienna Healthcare Association, is the largest healthcare provider in Austria and the backbone of Vienna’s healthcare. It has 30,000 employees in eight clinics, nine nursing homes and a therapy center (Ybbs) who ensure that the residents of the capital of Austria receive the best medical, nursing and therapeutic care round the clock.