When a Glazing Project “Loses Control” — What Industry Research Actually Shows

Loss of Control Is About Predictability

When stakeholders say a project has “lost control,” they rarely mean that work has stopped. More often, they mean predictability has eroded. Milestones still appear on the schedule, submittals are being processed, and coordination meetings continue—but confidence in outcomes has weakened.

Construction research consistently shows that projects do not fail because of one dramatic event. They fail because early-stage decisions are deferred and risk accumulates unnoticed. Bent Flyvbjerg’s research on large-scale projects demonstrates that optimism bias and delayed confrontation of uncertainty are systemic drivers of cost and schedule overruns (Flyvbjerg, 2014). The mechanism is not limited to megaprojects. It applies directly to facade and glazing work.

In glazing projects, predictability declines when interface decisions are left unresolved while fabrication timelines continue advancing.

Interface Failures Drive Disputes

Annual industry analyses reinforce this pattern. Both the Arcadis Global Construction Disputes Report and HKA’s CRUX Insights identify design coordination and interface management failures among the leading causes of claims and schedule impact worldwide (Arcadis, 2023; HKA, 2023).

This dynamic is particularly relevant to glazing. Curtain wall systems intersect with structure, waterproofing, firestopping, and adjacent cladding at nearly every edge. When these scopes are reviewed independently but not reconciled collectively, the project carries hidden exposure.

A slab edge may be structurally acceptable yet exceed glazing tolerances. A firestop assembly may be listed yet invalidated by minor framing adjustments. A waterproofing detail may stop short of curtain wall continuity, leaving performance dependent on assumptions rather than assignment.

Each trade may be compliant. The system may still fail.

Research on construction productivity highlights how discipline fragmentation reduces reliability and increases downstream risk (McKinsey Global Institute, 2017). Facade work—fabrication-driven and tolerance-sensitive—amplifies these coordination gaps.

Fabrication Locks In Risk

Unlike many trades, glazing fabrication fixes geometry early. Once material is cut, finished, or assembled, flexibility narrows rapidly.

Lean construction research emphasizes that workflow reliability depends on removing constraints before execution begins (Ballard & Howell, 2003). When unresolved coordination issues are carried into production, variability increases and recovery options shrink.

In facade projects, unresolved interface decisions become materially more expensive once fabrication is underway. What could have been clarified during coordination becomes redesign under schedule pressure.

That transition often marks the point when stakeholders describe the project as losing control.

Approval Is Not Integration

Facade industry guidance, including technical publications from the Centre for Window and Cladding Technology (CWCT), stresses early tolerance reconciliation and integrated system coordination. Yet submittals are frequently reviewed within discipline boundaries. Structure is approved. Glazing is approved. Firestopping is approved.

Approval becomes procedural rather than integrative.

Claims research consistently shows that late design changes and coordination deficiencies remain among the most common drivers of disputes (HKA, 2023). The pattern is consistent: approvals occur, but the system as a whole is never fully validated.

Managing for Stability

Industry data is clear that coordination gaps and deferred decisions materially contribute to cost escalation and schedule volatility (Arcadis, 2023; HKA, 2023). In glazing projects, maintaining control requires reconciling tolerances before fabrication, assigning ownership to interface conditions, confirming sequencing while flexibility still exists, and treating submittal approval as conditional rather than final.

These steps may slow visible momentum briefly, but research shows that early constraint removal improves overall reliability and reduces downstream instability (Ballard & Howell, 2003).

Closing

When a glazing project appears to “lose control,” the underlying issue is rarely effort or competence. It is predictability. Coordination gaps and deferred decisions accumulate quietly until fabrication and installation remove flexibility, at which point the cost of correction rises sharply.

Industry research consistently links interface failures and late-stage coordination breakdowns to disputes, overruns, and schedule impact. In facade work, where systems intersect tightly and geometry locks in early, those effects are amplified.

Control, in this context, is not about authority. It is about early clarity—clarity across trades, across tolerances, and across sequencing—established before the field is forced to provide it under pressure.