Abstract
Abstract Background: During major maintenance projects on offshore installations, flotels are often used to accommodate the personnel. A gangway connects the flotel to the installation. If the offshore conditions are unfavorable, the responsible operatives need to decide whether to lift (disconnect) the gangway from the installation. If this is not done, there is a risk that an uncontrolled autolift (disconnection) occurs, causing harm to personnel and equipment. Objectives: We present a decision support model, developed using the DEXi tool for multi-criteria decision making, which produces advice on whether to disconnect/connect the gangway from/to the installation. Moreover, we report on our development method and experiences from the process, including the efforts invested. An evaluation of the resulting model is also offered, primarily based on feedback from a small group of offshore operatives and domain experts representing the end user target group. Methods/Approach: The decision support model was developed systematically in four steps: establish context, develop the model, tune the model, and collect feedback on the model. Results: The results indicate that the decision support model provides advice that corresponds with expert expectations, captures all aspects that are important for the assessment, is comprehensible to domain experts, and that the expected benefit justifies the effort for developing the model. Conclusions: We find the results promising, and believe that the approach can be fruitful in a wider range of risk-based decision support scenarios. Moreover, this paper can help other decision support developers decide whether a similar approach can suit them
Highlights
During the autumn of 2016, we developed a computerized model to support decisions based on operational safety risk offshore
We identified the following success criteria for the model: C1: The decision support model should provide advice that correspond with expert expectations
C1 (The decision support model should provide advice that correspond with expert expectations): In our context, expert expectations are represented by the opinions of the offshore operatives taking part in the evaluation in the final meeting, as well as the Location Specific Operational Guidelines (LSOG), which is based on expert knowledge
Summary
During the autumn of 2016, we developed a computerized model to support decisions based on operational safety risk offshore. The model automatically provides a decision advice based on 28 input parameters, and was developed using DEXi (Bohanec, 2017), which is a tool for multi-criteria decision modeling. If the offshore conditions are unfavorable, the responsible operatives need to decide whether to lift (disconnect) the gangway from the installation. If this is not done, there is a risk that an uncontrolled autolift (disconnection) occurs, causing harm to personnel and equipment. Objectives: We present a decision support model, developed using the DEXi tool for multi-criteria decision making, which produces advice on whether to disconnect/connect the gangway from/to the installation. This paper can help other decision support developers decide whether a similar approach can suit them
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