How Audi is building an agile, resilient factory of the future

The challenge of the modern factory floor 

Audi, a name synonymous with German engineering and the philosophical manifestation of "Vorsprung durch Technik"—progress through technology—operates at the pinnacle of automotive manufacturing. When drivers get behind the wheel of an Audi, the experience is exceptional and enhanced by intuitive and sophisticated modern features that range from the Virtual Cockpit digital display to Quattro all-wheel drive.  

Building millions of vehicles annually across its global facilities demands an intricate dance of precision, speed, and unwavering reliability. On Audi's factory floors, thousands of robots, intricate machinery, and human operators work in perfect synchronicity, a 24/7 operation where every movement is meticulously choreographed.  

"At all times, there is no room for error," says Thomas Kampa, IT Solution Architect at Audi. Yet, behind this operational marvel lays a growing challenge. The traditional approach to factory automation relied heavily on physical hardware: countless ruggedized computers and programmable logic controllers (PLCs) or "gray boxes" scattered across the shop floor. Each box performed a specific function, from controlling robot movements to ensuring worker safety.  

Audi envisioned a future where its factories were not just automated, but truly software-defined and able to adapt with new levels of agility and efficiency.  

Edge Cloud 4 Production (EC4P) was born from this vision, with Audi aiming to virtualize not only worker guidance systems or other classical server client applications, but also the critical control logic of the factory floor, moving it from individual hardware boxes to a centralized, flexible edge cloud environment. The core challenge was immense: how to achieve this virtualization for highly critical real-time applications like PLCs, maintaining the absolute precision, safety, and microsecond-level latencies that automotive production demands, without disrupting a single robot's movement.  

"We had to deliver a platform that is capable of communication in real time," Sven Mueller, EC4P Project Lead, explains. "We had to deliver a network that is capable of doing that. And of course, the applications must also be capable of doing that."  

Engineering a software-defined future 

Tackling this ambitious transformation demanded not just technological innovation but meticulous planning and robust execution. The scope of the EC4P project far exceeded a typical IT upgrade; it required a fundamental rethinking of the factory's operational technology (OT) infrastructure. Cisco offered a willingness to co-develop an integrated approach and invest in a dedicated team that shared Audi's bold vision. "Cisco came to us not just with a solution for a single problem," Kampa says, "but an entire stack of solutions that bring together the 'platform thinking' that is required." 

At the heart of this solution, Catalyst Center running Cisco SD-Access (SDA) provided the architectural framework to virtualize the network and create a robust, intelligent fabric capable of handling the extreme demands of Audi's production environment. Cisco SDA provided microsegmentation that would allow Audi to precisely control and isolate communication between devices and applications.  

"In a production environment, you have lots of critical applications," says Kampa, "and also vulnerable ones, because we are talking about legacy applications that sometimes have been there for quite a while. So the only way to really secure them is with an infrastructure that allows you to segment each of these applications and make sure they can only communicate with the right partners that are, again, being secured by the entire infrastructure." 

Another key feature was that Cisco SDA was able to create an overlay network, which enabled workers to use applications in the same way they always have, even after their control logic was migrated to the edge cloud. "With SDA, we can make it seem like they never left the plant floor," Kampa says. "The look and feel at the shop floor level remains the same, which contributed heavily to the adoption of EC4P." 

The collaboration also focused on building an infrastructure with unparalleled fault tolerance. "This is a long chain with many, many pieces in between," says Kampa. The solution was designed with redundancy at its core. Data frames are duplicated across multiple paths, ensuring that if one link fails, the process continues without interruption.  

This is evident not only in the architecture but also in the network devices themselves. Ruggedized Cisco Industrial Ethernet switches not only deliver robust connectivity and advanced security in demanding OT settings, but also integrate IT proficiencies. Automation—a cornerstone of Cisco SDA—dramatically simplifies the rollout of new policies across hundreds of network switches through Cisco Catalyst Center, replacing tedious manual configurations with swift, centralized control. 

Seamless transformation for a resilient future  

The EC4P project has moved beyond pilot phases and is now successfully deployed in serious production environments. "The good thing is, when I saw it working the first time, nothing changed," says Mueller, "so the robots were working precisely and as safe as they were before."  

This seamless transition, achieved with no downtime or visible impact to processes, has delivered transformative benefits for Audi. The inherent security of Cisco SDA, with its microsegmentation capabilities, provides a solid foundation for protecting critical OT assets, giving Audi the confidence that its production environment is secure and reliable.  

The centralized, software-defined control logic enables faster application deployment and updates, dramatically improving efficiency and agility. Kampa says, "For me, one of the biggest wins with SDA is automation. You don't have to touch every single device anymore or configure things one by one. Policies just roll out across the network—and it works."  

With the effort of managing thousands of physical boxes replaced by the ability to control applications from a central point, specialized personnel are freed from what Kampa refers to as "repetitive tasks that are not gaining any value." This allows Audi's experts to focus on higher-value challenges, further driving innovation and underscoring that this project is more than just an operational upgrade—EC4P is a strategic alignment with Audi's brand essence.  

Moving into the next software-defined era of production, Audi reinforces its position at the forefront of technological progress, not just in the cars they build, but in the very way they build them. "This project is definitely something that helps us push the boundaries of the technology and move toward the future," Mueller says. "We've shown that it is possible to do what everybody thought was impossible a few years before." 

The success of EC4P also provides a proven, scalable model for future deployments. Audi plans to expand the solution across its brand group, integrate advanced AI solutions onto the platform, and further align its manufacturing processes with the evolving concept of software-defined vehicles. 

"From the outside, it looks very complicated," says Mueller, "and to some degree, it really is. But with these tools that we have now, it kind of simplifies the whole process, from planning all the way to maintaining and finding possible faults and repairing anything. It gives us confidence in scaling out this technology and in being ready to do big rollouts in more factories."