Subsea system readiness level assessment

Both the American Petroleum Institute (API) 17N: 2009 and Det Norske Veritas (DNV) RP-A203 (2011) recommend that the technologies inserted into subsea installations should be assessed during design and manufacturing using a technology readiness level (TRL) scale. This should be used as a measure of maturity of all the individual technologies, for qualification and readiness assurance. This paper proposes the creation of a system-based approach for managing the development of subsea systems and making effective decisions to ensure the efficient progress of the project. It recommends complementing TRL with an integration readiness level (IRL) scale, to address IRL between the inserted technologies, along with a system readiness level (SRL) scale to assess the overall project status. It also presents a method for combining the current TRL scale and the proposed new IRL scale to determine an estimate of SRL at all stages of a subsea system development. This provides a composite metric for determining the system readiness level for project delivery. The application of the new proposed scales is demonstrated using a case example.