This datasheet presents estimates of fabrication, construction and installation risks in respect of asset damage/loss and personnel safety. The data are mainly applicable to offshore installations although reference is made to onshore construction fatal accident rates. The datasheet has not been designed to assist with the quantification of general project management uncertainties for the purpose of estimating the likelihood of project schedule and cost overruns. This is considered to be a separate subject. Measured in terms of the life-cycle of a project, the fabrication, construction and installation phases have a short duration and can be characterised as: • labour intensive, • involving a large number of one-off tasks, • requiring temporary work arrangements and working environments, • exposing components/structures to non-design loading condition.