The hidden cost of disciplinary silos in critical infrastructure
By SCI Editorial ·
Every critical-infrastructure project we audit has the same shape. The mechanical scope is delivered. The electrical scope is delivered. The controls scope is delivered. Each one passes its own commissioning. And then the building doesn't behave the way the brief described, and nobody owns the gap.
Why the silo wins by default
Silos are the path of least resistance for procurement. A bundled integration scope is harder to tender, harder to value-engineer, and harder to fit into the standard contractual shapes the industry uses. So projects unbundle, awarding each discipline separately and assuming integration will land at the seams.
“The integration risk doesn't disappear when you split the contracts. It just moves to the party least equipped to absorb it: the client.”
What the cost actually looks like
- Rework at commissioning: 4-8% of contract value, typically, when the seams haven't been owned through design.
- Schedule slip: 2-6 weeks added to commissioning windows for unplanned integration troubleshooting.
- Compliance audit fail-and-retry: Tier ratings, GMP validation, IEC 62443 conformance evidence — all suffer if integration is incomplete.
- Operational year-one drag: estates teams operating around the seams rather than through them, with workaround procedures that calcify.
What the fix costs
Naming an accountable integrator from RIBA Stage 2 adds 0.5-1.5% to project cost. Across our portfolio the savings have been measurable in months 6-18 of operation — the year-one drag goes away.