This paper explores the challenge of gathering, assessing and usefully managing large quantities of hull inspection data so that this can provide useful information. It will address assessment of the data to ensure that it is possible to clearly understand what is important today, what might be an issue tomorrow and to identify trends and evaluate inspection / repair burdens in the future.
As an FPSO hull structure ages, the routine structural inspection activities produce increasing volumes of data as time progresses. In the initial years of production this does not present a major issue to manage as the number of structural deficiencies will (hopefully) be small. Beyond 10 – 15 years on-station, where inspections are carried out there are often significant numbers of inspection findings reported (>1500 per year).
It is important that data is captured accurately at the time of inspection, whilst the personnel and access are available. In the early years of asset life, where the number of findings may be only 1 or 2 per day of inspection, efficient handling of the data and assessment isn't a high priority. During busy inspection campaigns during the later life of the asset, good quality reporting and efficient data handling become critical factors as it is possible to have 3 inspection teams on an asset producing upwards of 60 inspection findings per day, 7 days per week. Failure to effectively keep up with the processing of the inspection findings under these conditions will result in inaccuracies in the data and a failure to correctly assess criticality and the necessary actions arising.
Based on Marine Technical Limits extensive experience of managing significant volumes of hull inspection data for various FPSOs over the previous 10 years, this paper will detail the key criteria and an effective approach for handling, processing, assessing and using hull inspection data to produce useful information.