The logair Route Structure: An Exploration of the Single-Hub Concept

摘要

This thesis examined the feasibility of a single-hub route structure concept. This represents a marked departure from the present trunk-and-feeder route structure which utilizes multiple hubs of operation. The idea was based upon the routing network used by several commercial air freight carriers. A computerized simulation program, SIMSCRIPT II.5, was employed to evaluate a single-hub structure incorporating as many real world constraints as was feasible. System performance was simulated for a 90-day time period. Results indicated that a single-hub route structure could provide next day delivery for practically all priority one, two, and three cargo. In comparison to the trunk-and-feeder system, transit time was improved by 0.22 days (17.9%). But contract operating costs (based on FY 80 figures) increased by $9,354,000 (19.6%). Furthermore, 23 aircraft were required versus 15 under the present system for CONUS operations. This increased cost was counterbalanced by a projected savings of $10,700,000 annually in spares inventory to be realized by a faster supply pipeline. (Author)