The methodology for reducing subsea failures is formalized in DNVRP- A203. It provides a systematic risk-based approach for obtaining the goals of the qualification. The qualification process comprises the main activities listed next. At each step of the process there is a need for documentation making the process traceable.

  • Establish an overall plan for the qualification. This is a continuous process and needs updating after each step using the available knowledge on the status of the qualification.
    File:RCDA Process Flow Diagram (13).png
    RCDA Process Flow Diagram (13)
  • Establish a qualification basis comprising requirements, specification, and description. Define the functionality and limiting parameters.
  • Screen the technology based on identification of failure mechanisms and their risk, and classification of the technology according to degree of newness to focus the effort where the related uncertainty is most significant.
  • Assess maintenance, monitor conditions, and review possible modifications for their effect on the qualification basis.
  • Plan and execute reliability data collection. The data are used to analyze the risk involved in not meeting the specifications through experience, numerical analysis, and tests.
  • Analyze the reliability and, thereby, the risk of the failure modes related to the functional requirements.


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[14] Det Norsk Veritas, Qualification Procedures for New Technology, DNV-RP-A203, 2001.

[15] M. Tore, A Qualification Approach to Reduce Subsea Equipment Failures, in: Proc. 13th Int. Offshore and Polar Engineering Conference, 2003.