Designing a Quality Assurance‑Driven Lifecycle Optimization Framework for Refurbishment and Reuse of Subsea Production Hardware

The refurbishment and reuse of subsea production hardware have emerged as vital strategies for reducing capital expenditure and supporting sustainable offshore operations. However, the absence of standardized quality assurance (QA) practices across the asset lifecycle has limited the reliability, scalability, and industry-wide acceptance of reuse initiatives. This paper proposes a QA-driven lifecycle optimization framework tailored to subsea hardware, embedding quality checkpoints, inspection protocols, and traceability requirements into each phase, from acquisition and operation to retrieval and refurbishment. The framework incorporates defined QA gates, condition-based assessment logic, and digital documentation to ensure that only components meeting rigorous integrity standards are redeployed. By integrating QA principles throughout the lifecycle, the model addresses key industry challenges such as data fragmentation, inconsistent evaluation criteria, and uncertain reuse outcomes. It further outlines practical implementation pathways and highlights the potential for long-term cost efficiency, risk reduction, and standardization across the sector. Future research directions are identified, including the adoption of AI-powered inspection systems, digital twin integration, and policy development to support global QA harmonization. The proposed framework lays the groundwork for more trustworthy, efficient, and sustainable reuse practices in subsea asset management.