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EN
The safety of operations is vital in any process in the oil and gas sector, especially given that increasingly more hydrocarbon reserves are discovered in non-conventional remote and Arctic locations. Safety systems are designed as a part of a complex IT system for process control. The design of these systems is conducted in the form of an engineering project. This research presents a decision-making framework to facilitate formulating clear and comprehensive recommendations for the requirements specification developed for the safety systems. The contribution of this research to the strategic planning area of IT solutions for hazardous industrial facilities is integrating the problems of designing a safety system, planning its maintenance, and scheduling the employees to conduct the required maintenance. With this joint decision-making, it is possible to explore trade-offs between investments into the systems’ complexity and workforce-related expenditures throughout the solution’s lifecycle. The reliability modelling is conducted with the help of Markov analysis. The multi-objective decisionmaking framework is employed to deduce straightforward requirements to the safety system design, maintenance strategy, and workforce organisation. This research is relevant to managing the petroleum sector engineering projects with regard to the design of technological solutions.
PL
Niniejszy artykuł jest drugą częścią cyklu prac prezentujących metodykę modelowania systemów informatycznych firmy AION. Ma na celu prezentację, opracowanego przez firmę AION, spójnego podejścia do prowadzenia analizy systemów informatycznych. Omówiono w nim uporządkowany sposób opracowywanie specyfikacji wymagań wobec systemu oraz propozycji rozwiązania informatycznego realizującego te wymagania. Prezentowane podejście umożliwia opracowywanie, rozwój oraz walidację proponowanych rozwiązań informatycznych.
EN
The article describes an approach to requirements specification and analysis being the second stage in the overall software modeling method developed by AION. The purpose of this work is the presentation of compact and systematic development process. The article describes the rules to be followed during the analysis phase of information system. The resulting model integrates the static, dynamic and functional properties of system with business requirements specification realized in this phase of development process. The presented approach enables develop/nent and evolution of software solution and allows to check the conformance of this against the actually users requirements.
3
Content available remote Requirements specification with decision tables and rough sets
EN
The paper examines decision tables as a requirements specification technique. In our approach, state machines model the dynamics of reactive systems, whereas decision tables provide a knowledge base defining their behaviour in each state. We apply rough set theory, which provides a methodology of decision table analysis, to formally verify and minimize the decision tables. The resulting tables can be converted automatically into executable code, thus bridging the gap between analysis, design and implementation.
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