besluitvorming business complexsystems computerprograms congresses criticalthinking decisionmaking economicdevelopment electronicspreadsheets environmentaleducation environmentalpollution managers microsoftaccess microsoftexcel microsoftexcel(computerfile) policy politicalscience pollution population problemsolving professionalemployees publicpolicy simulationmethods socialpolicy socialproblems socialsciences sustainabledevelopment sustainablegrowth systeemtheorie systemanalysis systems systemsanalysis systemsdynamics systemsthinking systemtheory