A similar Web-based system is used by Malaysia Airlines, as of summer 2003,to optimize manpower utilization. Also called ICMS, it leverages optimizationsoftware from ilog.com. Its Crew Pairing Optimization (CPO) module utilizes IlogCplex and Ilog Solver optimization components to ensure compliance with air-line regulations, trade union agreements and company policies, minimize thecosts associated with crew accommodations and transportation and efficientlyplan and optimize manpower utilization and activities associated with long-term planning and daily operations. The Crew Duty Assignment (CDA) mod-ule provides automatic assignment of duties to all flight crews. The system con-siders work rules, regulatory requirements as well as crew requests to producean optimal monthly crew roster.