Harald Solaas Harold Elliot Jaques Requisite Organization RO theory levels of work measurement accountability level of responsibility authority managerial leadership practices social analysis strata stratum multilevel organization job evaluation work analysis work capability discretionary content prescribed content executive leadership knowledge-creating company intrinsic motivation wage differential personnel selection performance appraisal what is work managerial limit effort wage bargain requisite analysis value engineering levels of abstraction time perspective time horizon temporal horizon corporate culture company culture job satisfaction hierarchy levels organizational effectiveness managerial capability Canadian Centre for Leadership and Strategy Elliott Jaques