... histogram, 176 product risk assessment, 166–9design risk, 1 67 8design risk ranking, 1 67 limiting risk, 168–9probability of failure, 1 67 comparison of different life characteristics, 172 , 175 data ... operable, and capable of tight shut-off even in a fi re. The work permit system The case study underlines a lack of a safety culture and effective risk man-agement as shown by the loose operation of the ... orderNeither the offshore installations manager nor his deputy ever issued the order to abandon the platform. They were the only persons authorised to do so. The 61 men who survived abandoned the...