Mission-critical connectivity in the modern factory

Mission-critical connectivity is now a defining condition of modern manufacturing, but the assumptions underpinning factory operations have not caught up. For a generation, the network was a switch in a closet, a Wi-Fi router, a cable to the PLC. It did its job in the background. That arrangement is breaking down. Machines on the shop floor now generate continuous data. Robots negotiate space with humans. A missed millisecond on a collision-avoidance loop is the difference between a near-miss and a fatality. Connectivity has become safety-critical, revenue-bearing production infrastructure. A panel at this year’s Manufacturing IT/OT Summit in Boston, moderated by GSMA Senior Director Shane Rooney, set out what that shift means for the people running plants.

The death of the air gap

The traditional plant ran on a clean separation. Information technology (IT) lived above the factory floor. Operational technology (OT) ran the machines. The boundary between them, the ‘air gap’, was load-bearing infrastructure in its own right: it kept attackers out and kept production stable. That structure is dissolving because the data has to move. Fares Saka, Director of Smart Industries at Orange Business, placed the transformation inside a longer arc of industrial change. “Steaming machines needed concrete. Electrification needed copper. With Industry 4.0, connectivity is that infrastructure foundation.”

By extension, modern factories are increasingly dependent on mission-critical connectivity. Once data flows continuously in both directions, the security model has to change with it. Viswanath Kolur of Ericsson Enterprise Solutions framed the problem in operational terms: “More devices are getting added, more use cases are being built, including the ones that require closed loop operation where critical machinery is being handled in real time. The attack surface has increased and the data moving from OT to IT has increased phenomenally.”

The practical effect is that security stops sitting downstream of integration and becomes its driver. “Typically, security is the one that brings everybody together,” Saka noted. “Since we’ve been able to bring more people together instead of pointing fingers, IT versus OT, we’ve seen a tremendous amount of progress in terms of deployment.”

The integration cost itself remains punishing. Dr. Mark Maybury, now Vice President of Commercialisation at Lockheed Martin, lived through it at industrial scale: “The tax for integration was 50%. I literally was at a meeting with a whole bunch of robotic manufacturers and I said, I will give you twice as much money if you take away my integration pain.”

When latency stops being a network metric

A common reflex among IT teams is to ask why the existing wireless network will not support mission-critical connectivity. The answer is that it usually can, until production depends on it. Saka recounted a recent Wi-Fi survey at a customer site that looked clean on paper: “The signal strength is pretty good. But it was pretty good from an office perspective. As soon as you increase the threshold towards the industrial production environments, the maps become red, really red.”

Cabling has its own limits. Logistics centres redraw their floorplans every few months, and each change is a re-cabling job and a stretch of expensive downtime. Private 5G adds a different category of guarantee: deterministic behaviour, sub-ten-millisecond latency, licensed spectrum, and mobility-at-scale handovers that keep an AMR connected across cells. “You cannot really batch-process a collision-avoidance system,” Saka observed. Latency is no longer a quality-of-service metric. It is a safety control.

Kolur described a fabrication facility in Japan where an eight-second connectivity outage cost hundreds of thousands of dollars, because process manufacturing wrote off the materials along with the minutes. “Whether it’s a robot or a welder or a PLC, it’s going to shut down the whole operation.”

The robot-ready factory

The case for mission-critical connectivity rests today on AGVs, computer vision and predictive maintenance. The more pressing case is what arrives next. Maybury walked the panel through a scenario already in commercial deployment: “Boston Dynamics is going to start selling their humanoids to third parties in 2027. That’s nine months away.”

Two robots negotiating who picks up a dropped package, a supervisor slowing the line, a model update streaming to a robot mid-shift: none tolerates the lag of a best-effort network. Kolur identified the structural change underneath. Decision-making has to leave the robot itself. “All the decision-making has to be taken out of the robots and put on the edge, because there is one brain that is running all these robots to complete a task in unison.”

The certification consequence is heavier. Aerospace and defence regulators do not accept opaque autonomy. As Maybury put it: “The reason we have a fully certified helicopter right now is because it’s inspectable by the FAA. They can look at every single action. It’s deterministic.” The factory equivalent is a network carrying sensor telemetry, model updates and override commands inside a 200-millisecond response cycle. That is the workload mission-critical 5G was designed to handle.

The economic argument for mission-critical connectivity

The most consequential change in the room was commercial. Procurement conversations have long compared private 5G to Wi-Fi on a unit-cost basis. The panel argued that this is the wrong frame.

OT teams, Saka observed, have begun “to treat connectivity as a production asset, basically as important as a PLC.” Downtime costs of $5,000 to $25,000 per minute change the maths quickly. Maybury made the productivity case in plain terms: “If I can move that plant from 80% efficiency to 99% efficiency, that’s a massive value generation. We need to start looking at it as value creation, not as a cost centre.”

The future of mission-critical connectivity in the modern factory

Kolur closed with the inverse calculation: “What is the cost of not deploying, of not embracing these technologies, especially as you get towards the factory of the future?” For any manufacturer planning capex against a horizon that includes humanoids on the line, that question belongs at the top of the next investment review.

The panel’s substantive claim was that manufacturing has crossed a threshold at which legacy connectivity constrains what the business can do. The challenge for plant operators, IT leaders and finance teams is to recognise the shift, bring OT into the room early, and start measuring connectivity by the production value it carries rather than the bandwidth it provides.

For more information on the mobile industry’s role in transforming industrial operations, please visit the GSMA’s Connected Manufacturing and Production Community Meeting.