TY JOUR TI DEVELOPMENT OF AN ECONOMIC AND MATHEMATICAL MODEL FOR MONITORING THE TOTAL COST OF RISKS IN THE MANAGEMENT SYSTEM OF INVESTMENT AND CONSTRUCTION PROJECTS KW construction KW result KW risks KW project KW uncertainty KW safety KW efficiency KW block KW stage KW life cycle KW stage KW cost JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Astashenko, A.N. PY 2023 IS 2023 PB Saint-Petersburg University of State Fire Service of Emercom of Russia