Vendor inspection at exchanger tube fabrication should be mandatory hold point — not merely a witness point — for all process-critical heat exchangers. Factory acceptance costs ~$15K but prevented a potential $420K rework + delay cost.

Long-lead item risk assessment should assign dedicated supply chain resource for monthly vendor factory visits during fabrication period, not just at FAT stage.

Design freeze for exchanger nozzle orientation was achieved 6 weeks later than planned — earlier engagement with operations team would have avoided one PCO.

The original schedule had zero float between exchanger bundle arrival and mechanical completion. A 15-day float buffer on all single-source long-lead items should be built into base schedule at Rev 0.

DCS integration testing was sequenced too tightly after instrumentation installation — a 2-week minimum gap for loop checking would prevent compression in the commissioning phase.

The suspended work platform system for scaffolding reduced scaffold erection/dismantling labour by 38% and eliminated 9 scaffold-related safety incidents compared to prior refinery turnaround. This approach should be mandated on all future hydrocarbon facilities.

Piping pressure test campaign (zero failures) was attributable to the pre-test quality verification checklist introduced by the QA Manager in August 2025. This checklist should be standardised across the portfolio.

Project achieved 462,000 person-hours LTI-free — the longest LTI-free run in TechPro's refinery division. The hand-in-hand HSE program with the client's safety team was instrumental.

Early agreement with client on PCO unit rates (prior to execution) eliminated all cost disputes and enabled rapid PCO approval. This commercial pre-agreement approach should be replicated in all future EPC contracts.