Kennedy Space Center NextGen Website

The Architectural Assessment Tool Model (AAT)

Disclaimer: This material is being kept online for historical purposes. The model, simulation or tool described is no longer maintained. It is no longer available on request, and/or may not function on current computer systems.


The Architectural Assessment Tool (AAT).
The Architectural Assessment Tool (AAT).

The Architectural Assessment Tool (AAT) is a software tool intended to assess space transportation systems that are only beginning to be defined, systems at the "concept level". A series of screens walk the user through questions which define the system/concept, allowing an assessment of various factors, especially operability.


  • Relative measures, generating an index of improvement, not absolute costs or turnaround times.
  • Emphasizes reusable vehicle design complexity and it's relation to operational complexity and effectiveness.
  • Captures design features that favor operational, recurring launch, "-ilities".
  • Does not address organizational design, as inputs or drivers (efficiency, process, practices, acquisition approach, supply chain management, best practices or business approaches).
  • Useful for students wishing to learn about how design features relate to the ease of launch site operations.

An example AAT output screen.
An example AAT output screen.