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SAGE - Schedule and Activity Generator / Estimator

A Space Transportation Systems Operations Model

2004

Papers & Presentations ¦ The Project ¦ Contact

• Adds detail to operations analysis
  • Estimate turnaround times for reusable space transportation system elements
• Maintains ease of analysis
• Leverages off of the Shuttle RCA Operations Database
• Allows innovative sub-system and system definition
  • Explore improved maintainability, integration of parts, shared sub-systems architectures, and simpler, reduced parts count designs
  • Explore improved reliability and supportability
• Integrates with existing simulation tools

Papers and Presentations:

• 2004: From the Winter Simulation Conference, "An Integrated Estimation and Modeling Environment for the Design of the Orbital Spaceplane", (.pdf file), by Dayana Cope, Mansooreh Mollaghasemi Ph.D, & Assem Kaylani of Productivity Apex Inc., Martin Steele Ph.D, of NASA Kennedy Space Center, Alex J. Ruiz-Torres Ph.D of Polytechnic University of Puerto Rico, and Marcella Cowen of Blue Frog Technologies Inc.

• 2006: As published in the Journal of Knowledge Based Systems "Knowledge based representation and operations assessment of space transportation system architectures" 22 June 2006, (.pdf file), by Alex J. Ruiz-Torres Ph.D of University of Texas at El Paso, Edgar Zapata of NASA Kennedy Space Center, Kazuo Nakatani Ph.D of Florida Gulf Coast University and Marcella Cowen of Blue Frog Technologies Inc.

The Project:

• Created a model that took advantage of data from the Space Shuttle Root Cause Analysis Study so as to explore the way differing space transportation architectures affect ground processing time at the Kennedy Space Center.
• Provided a basis for making ground operations timeline estimates combining relatively simple architectural level inputs correlated to advances or declines in processing times relative to the Space Shuttle data.

Use Case

Input your concept building it up sub-system by sub-system

Delve into the details of design definition

View output reports

Feed the model estimates forward to the GEM-FLO simulation tool by NASA KSC and Productivity Apex Inc.

The Team & Acknowledgements:

• NASA Kennedy Space Center
  • Edgar Zapata, Principal Investigator & COTR, KSC

• Blue Frog Technologies Inc. TX
  • Dr. Alex Ruiz-Torres, Lead Investigator and Integrator
  • Dr. Kazuo Nakatani Ph.D of Florida Gulf Coast University
  • Marcella Cowen

• Acknowledgements:
  • The Space Shuttle Root Cause Analysis Study was crucial to the advancement of this tool, starting as a prototype for exploring certain calculation schemes, ending as a small project and a software tool that established calculation schemes for measuring the relation of sub-system level descriptions to advances or declines in processing times relative to the Space Shuttle.

Milestones:

• Project complete October 2003.

Contacts, Further Information, Distribution:

The SAGE tool is freely available to government, industry and academia upon request. Please review all "models" in considering any need for a copy. Please state name and organization with the request.

• Edgar Zapata at NASA Kennedy Space Center
• Blue Frog Technologies, Alex Ruiz Torres, Ph.D

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Also see:

• Blue-Frog Technologies Inc.
• Models

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Website Contact: Edgar Zapata, NASA Kennedy Space Center