6. Crew Support Capability This item includes crew support with regard to routine crew supplies, emergency resupply, and crew subsystem support for centralized vs. dispersed crew locations. 7. Transportation Between Elements This area concerns the need and frequency of internal and external transportation between construction base elements due to SPS configuration complexity. 8. Infrequent Docking/Undocking This item addresses the level of docking/undocking required during the SPS construction phase. 9. Central Control for Subsystems This item concerns centralized vs. decentralized control for subsystem operation during SPS construction. 10. Less Duplication of Systems and Modules This item concerns the level of systems and module duplication which should be kept to a minimum without compromising system efficiency. 11. Location for Maintenance and Repair of Systems This item concerns location of maintenance and repair facilities during SPS construction and subsequent location during SPS operational phase. 12. Orbital Efficiency This item concerns the initial and final locations of the entire construction base elements during the construction phases such that the overall control of the SPS can be enhanced with regard to reducing gravity gradient torques and attitude control propellant use. 13. Facility Ingress/Egress This area relates to the ease or capability available for the crew to ingress/egress construction base elements such as emergency escape routes, EVA route, and facility to transportation system route. 14. Location Relative to Growth Facilities This item regards the initial buildup configuration and facility add-on capability.
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