doctoral_advisor death_date death_place birth_place citizenship image_size fields workplaces birth_date known_for image article_title name
selim krein 11 june 2005 voronezh , russia voronezh , russia russia 200px mathematician , economist voronezh state university , russia 7 march 1938 some new concepts in qualimetry and systems analysis . russman.jpg isaak russman
 isaak russman
isaak russman

isaak borisovich russman -lrb- ; 7 march 1938 -- 11 july 2005 -rrb- was a russian mathematician and economist .
he studied and worked at voronezh state university .
isaak borisovich russman was born on march 7 , 1938 in voronezh .
although his childhood dream was studying astronomy , in 1955 he entered voronezh state university where he studied in the physics and mathematics department .
starting in 1969 and until the end of his life , russman conducted research in operations research at the same institution where he had studied .
russman taught discrete mathematics , the theory of algorithms and mathematical logic , probability theory , economic cybernetics , and systems analysis .
russman conducted research on topics related to simulation-targeted systems -lrb- economic , social , institutional -rrb- , quality assessment , and building valuation models .
he is famous for creating the concept `` difficulty in achieving the objectives '' , a concept which is used to assess the value of a certain specified requirement .
this approach was usefully applied to models of control and management of organizational systems and portfolio optimization models .
