The old corporate playbook said surge to meet demand. Charles Kirol says that playbook is dead.

Speaking at Fortune‘s COO Summit, Peloton’s Chief Operating Officer — a nearly 40-year U.S. Navy veteran who once commanded nuclear submarines — delivered a blunt challenge to the business leaders in the room: in a world of geopolitical volatility and broken supply chains, efficiency alone will get you killed.

“Both in the Navy and at Peloton,” Kirol said, “efficiency without resilience is just a fast way to fail.”

His prescription starts with what he calls the “glass pipeline” — a concept he lifted directly from submarine logistics and grafted onto Peloton’s global supply chain. On a submarine, there’s no hiding a dwindling food supply: every crew member can see exactly where inventory stands at any moment. Kirol has built the same radical transparency into Peloton’s operations, using real-time KPI monitoring to surface what he calls “hidden tripwires” in the supply chain before they detonate — and crucially, empowering teams to act on those signals without waiting for executive approval.

It’s a direct rebuke to how most companies manage risk: by the time a problem reaches the C-suite, it’s already a crisis.