Implenia’s Patrick Sommer on breaking down silos on a complex hospital project
Implenia Schweiz is a leading Swiss total contractor operating across major construction projects, with a specialist division focused on laboratory and healthcare construction. As total contractor, the company is responsible for project management, overall planning, and delivery.
BIM has to be accessible to everyone
Patrick Sommer, Senior BIM Manager at Implenia Schweiz, leads the digitalization effort on the Kantonsspital Aarau project — a large-scale hospital development known internally as "Dreiklang." As total contractor, Patrick's team carries responsibility for planning coordination, specialist trade management, and delivery, giving them both the challenge and the leverage to drive digital processes across every phase.
Revizto has been central to that effort for four years. What started with issue management has grown into a platform that serves architects, specialist planners, contractors, and clients alike — all working from the same model. For Patrick, the key has been accessibility: Revizto's ease of use means that people with no BIM background can navigate the model, follow issues, and contribute meaningfully in planning meetings alongside technical experts.
The project presents a level of complexity that demands it. With 50,000 openings to coordinate in drylining alone — each requiring fire protection compliance — and a digital twin handover planned at project completion, there is no room for siloed working or disconnected workflows.
"BIM has to be accessible to everyone — operators, clients, specialist planners, contractors, and the whole project team. Revizto achieves that well, both for experts running clash automation and for everyone else picking up the model in a meeting."
Patrick Sommer, Senior BIM Manager, Implenia Schweiz
Nick’s top Revizto features:
FAQs
On complex projects like hospital builds, the project team extends far beyond BIM specialists — it includes clients, operators, facility managers, and contractors who may have little experience with 3D models. Revizto addresses this through predefined viewpoints and an intuitive interface that allows non-experts to navigate the model, follow issue threads, and participate meaningfully in coordination meetings. For Patrick Sommer's team on the Kantonsspital Aarau project, this broad accessibility was key to embedding Revizto as the central coordination platform across the full project.
Fire protection coordination on a large hospital project involves thousands of individual openings, each requiring compliance verification. Patrick's team at Planeco Schweiz used Revizto to overlay 2D fire protection plans directly onto the 3D architectural model, checking that specifications had been correctly implemented. Specialist groups — including architects, fire protection consultants, and contractors — then worked through the model together, wall by wall, resolving issues in a shared environment rather than across disconnected tools.
A digital twin handover means delivering an accurate, as-built digital model to the building operator at project completion — one that reflects real construction conditions rather than the design intent alone. Achieving this requires rigorous as-built documentation throughout the build. On the Kantonsspital Aarau project, Patrick's team uses Revizto to manage issues arising from laser scan point cloud analysis and augmented reality site verification, ensuring the model stays current and accurate ahead of handover.
On large projects, the transition from specialist planning to contractor delivery often creates a gap — generic design models don't always reflect manufacturer-specific dimensions and connections. Patrick's team addressed this by bringing contractors into Revizto for BIM-based fabrication and assembly planning, maintaining model continuity across the planning-to-delivery interface and avoiding the coordination breaks that typically occur at that handover point.
Traditional PDF-based plan review processes make it almost impossible to maintain oversight of open items across a large drawing set. Patrick's team replaced this with Revizto's issue tracking workflow, giving them a live view of which items were outstanding, which had been resolved, and what the deadlines were — all linked directly to the relevant part of the model.
