University of Houston Cullen College of Engineering

Department Event / Seminar

[IE] Set-Based Design for Early System Design Tradespace Exploration


Friday, September 13, 2019 - 1:00pm to 2:00pm


SEC 105

System Engineers perform Tradespace Exploration (TSE) in early system design to help identify
affordable system concepts that have the potential to meet stakeholder requirements. For complex
systems, TSE is challenging due to uncertainties about the future mission(s), environments,
threats, technologies, and requirements. Typically, systems engineers have identified and
evaluated “promising” point based designs that they believe span the system concept and design
space. Selecting the “best” point design has led to cost growth, schedule slips, and sometimes
program cancellation as the uncertainties are resolved. We consider an alternative, called
Set-Based Design, which seeks to identify the most promising sets to continue into design and
eliminates sets as information becomes available to reduce the uncertainties. This presentation
uses Probability Management© with an integrated trade-off analytics framework with Model-Based
Engineering to explore 100,000 potential system design concepts and architectures in near
real-time. We demonstrate TSE with SBD with an Army Unmanned Aerial Vehicle case study to
identify design sets, assess design feasibility, evaluate concepts (for both value and cost),
and assess requirements by displaying sets with common design choices. TSE with SBD can inform
future systems requirements and help systems decision makers select the most promising sets
for development.