Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Accessory Function and Aggregation Operator in Fuzzy Decision-Making Information Systems KH. ABD ALHADI, YU.V. MININ, V.M. TYUTYUNNIK Mathematical methods are proposed for the synthesis of accessory functions and aggregation operators corresponding to the experimental data and imposed constraints, using linear or quadratic splines. The methods are applicable for modeling and developing fuzzy decision-making information systems. Keywords: fuzzy system, decision making, affiliation function, aggregation operator. DOI: 10.25791/pribor.7.2023.1425 Pp. 28-32.