Boeing, which plans to raise airliner deliveries to as many as 445 planes this year, is increasing production to reap the profit on a record order backlog. Airlines are signing for new planes to expand and replace older, less fuel-efficient aircraft. At the same meeting, Scott Carson, the chief executive of Boeing Commercial Airplanes, said he expected to see five competitors emerging for aircraft seating 100 passengers or less. Participants in the industry include manufacturers from Russia, Canada, China and Brazil. A plane that size would go up against Boeing's 737.