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The selection of any new technological endeavor, and in particular the selection of new space programs, must employ criteria with differing levels of importance and scope in a In considering candidate space programs, two classes of criteria are of particular importance: the basic criteria used to establish overall objectives in certain general areas, and the specific characteristics to be considered in selecting particular logical sequence. programs in these areas.
Basic selection criteria relate to overall program-area benefits and technological
In sequential application of these criteria, it would first be determined if a particular
program's practicality and feasibility.
A key characteristic of programs that are designed to add to our existing knowledge is
FUTURE PROGRAM AREAS MUST SATISFY
BASIC SELECTION CRITERIA
Provide Substantial Benefit
■ Improve the Quality of Life
■Solve a Broad-Scale Technological Problem ■National Security
■ Advancement of Knowledge
Once overall program goals have been identified, more specific criteria should be used to
High Technology Content-Space programs high in technology content will be more
Ability to Stimulate Commercial Interest-Commercially attractive applications
Flexibility to Meet User Requirements - The ability of the program to meet changing
Adaptability to Changing Conditions - Longer-term programs are sometimes subject
Growth Potential-Future space programs will offer maximum growth potential if
Affordability-Cost considerations need to be examined in relationship to potential
We believe that there is a logical evolutionary approach to the planning of future space
Because the key to the growth options is additional electrical power, a power module would be the first important new element in the evolutionary sequence. A free-flying ered. Spacelab to provide a facility for science and applications research could then be considA construction-system module should follow in order to develop the capability to assemble large space structures in orbit.
With the development of these basic capabilities for electrical power, structural assembly, many different directions. and research, the space program could use the Space Transportation System to evolve in Some science and application payloads would be continually manned, and others would be assembled by man in orbit but would operate unattended except for occasional servicing.
These basic elements and payloads could become the stepping stones for further explorations in earth orbit and deep space. Synchronous-orbit operations, lunar programs, interplanetary ventures, and solar-system explorations will all require such elements.