Risk trends, indicators and learning rates: A new case study of North sea oil and gas

Determining the safety level based on this type of calculation can, however, be a difficult task. The recent PSA report states: ‘‘On the basis of the data and indicators used in this project, no clear positive or negative trends can be observed in risk level. Most major accident indicators show an improvement in 2003 in relation to 2002. Serious injuries to personnel also show a decrease in 2003. The position is now on a level with the average for the previous 10 years. Cooperation and trust between the parties are seen as good.’’