Ontology Using for Decision Making in a Competitive Environment Vasyl Lytvyn 1 , Oksana Oborska 2 , Victoria Vysotska 3 , Dmytro Dosyn 4 , Andriy Demchuk 5 1-3,5 Lviv Polytechnic National University, Lviv, Ukraine 1 Silesian University of Technologyty, Gliwice, Poland 4 Karpenko Physico-Mechanical Institute of the NAS Ukraine 1 Vasyl.V.Lytvyn@lpnu.ua, 2 Oksana949@gmail.com, 3 Victoria.A.Vysotska@lpnu.ua, 4 Dmytro.Dosyn@gmail.com, 5 Andrii.B.Demchuk@lpnu.ua Abstract. A method of decision making system elaboration in competitive environment based on ontological approach was developed. The models based on a hinged Boyd-Moore automaton. State machine loops are the stages Boyd and filling processes, ontology editing and a search of relevant knowledge ontology. Possible transitions between the states of the machine and transfer parameters between them were determined. For a quantitative modeling of decision support process in a competitive environment, mathematical support and methods of domain-specific ontology in the Boyd cycle (OODA – observation, orientation, decision, action) were elaborated. Thus, for the military at an “Observations” stage intelligence domain ontology determining of the strengths and weaknesses of the enemy. At the stage of “orientation”, ontological data are used for simulation of possible realizations of the battle and for optimal positioning of the forces. For “Resolution” stage, target distribution was developed using a method based on genetic algorithms, which helped to reduce the computational complexity of finding effective distribution targets. Ontology expertise based on descriptive logic is presented to increase the effectiveness of possible solutions. Keywords: decision support system (DSS), ontology, knowledge database, Boyd cycle (OODA), observation, orientation, decision, action, genetic algorithms, expected value, probability. 1 Introduction The effectiveness of modern armed forces largely depends on the professional level of command structure that, in turn, is defined by the degree of its automation [1]. Troop control automation can essentially enhance the combat capabilities and shorten the time supervisory units spend on operation planning and informing their command Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua