Incorporating System Properties into Multi-Attribute
Tradespace Exploration with Concurrent Design
Adam Ross, ESD PhD Candidate
Contact: Adam Ross
(adamross@mit.edu)
Committee: Daniel Hastings (Chair), Deborah Nightingale, Olivier de Weck, Thomas Allen
Motivation
The “MATE” System
Multi-Attribute Tradespace Exploration
Tradespace Exploration
enables ‘big picture’
understanding
LCC committed
100%
80%
Cost Incurred
66%
Detail
design/
development
Production
and/or
construction
Product use/
support/
phaseout/disposal
Value
2
3
MATE as a communication path
4
Conceptual Design
is high leverage
phase in system
development
Architecture
Exploration
Architecture
Evaluation
“Value-centric
Design”
Need
Identification
Cost
1.
2.
3.
4.
Point design
“Optimized” designs
“Optimized” sets
Full tradespace
Project 1
•
•
•
Decision
Theory
Design Theory
Lean Research
…
•
•
•
•
MATE as a process
Parametric
Models
Dynamic Models
Integrated
Concurrent
Design
…
Tradespace
Analysis
Techniques
•
•
Similarity analysis
Sensitivity
analyses
Portfolio Theory
Real options
…
•
•
•
MATE as a system
Ex. MATE-CON ilities
ResearchDiff*Q2
Priority
(N=9)
6
5
4
FFRDC
3
Prime
2
Flexibility…
(N=9)
7
•  Visited FFRDC, Prime contractors
•  Survey and interview
•  Air Force/LAI System Engineering for
Robustness Workshop
6
5
4
FFRDC
3
Prime
2
Utility
Scalability
Modularity
Maintainability
Agility
Robustness
Quality
Reparability
Safety
Fail-safe
Adaptability
Flexibility
Durability
Reliability
Sustainability
Testability
Operability
Manufacturability
ResearchDiff*Q2
Priority
SBR Design Tradespace
E
D
Robustness…
To changes in policy:
Modularity
Reparability
Maintainability
Quality
Safety
Fail-safe
Reliability
Flexibility
Durability
Testability
Sustainability
Robustness
Manufacturability
Adaptability
Agility
Scalability
Operability
Ross, Adam M. "Multi-Attribute Tradespace Exploration with Concurrent
Design as a Value-Centric Framework for Space System Architecture
and Design." Dual-SM, Massachusetts Institute of Technology, 2003.
C
Δ$ Cost of flexibility?
Project 2
Lifecycle Cost ($B)
Knowledge Capture, Synthesis,
Analysis: Develop MATE Matlab
toolbox and reusable model library
From Roberts, 2003
Related:
•  Adaptability (self-changing)
X-TOS
Focus on Robustness, Flexibility, Adaptability, Scalability…
•  Scalability (resizing)
–  Expanded generalized framework for Multi-Attribute Tradespace
Exploration with Concurrent Design (MATE-CON) process
–  Analysis for incorporating and understanding tradeoffs of certain
“ilities” in MATE-CON; impact assessment on quality of system
and system-of-system design through tradespace perspective
Ross, Adam M., Daniel E. Hastings, and Nathan P. Diller. "Multi-Attribute
Tradespace Exploration with Concurrent Design for Space System
Conceptual Design." In Aerospace Sciences Meeting, 14. Reno, NV:
AIAA, January 2003.
B
A
•  Anticipated contribution (by end of 2005):
Ross, Adam M., Nathan P. Diller, Daniel E. Hastings, and Joyce M.
Warmkessel. "Multi-Attribute Tradespace Exploration in Space System
Design." In World Space Congress, 1-14. Houston, TX: IAF, 2002.
1
0
–  Extend the Multi-attribute Tradespace Exploration with Concurrent
Design process to include consideration of several of the ESD
defined “ilities” system properties
Publications
1
0
1. What are the relationships between flexibility, adaptability,
robustness, and scalability/modularity for space systems?
2. How can these 3-4 ilities be quantified and/or used as decision
metrics when exploring tradespaces?
•  Objective:
Outputs
Advanced
Model/Sim
System Design(s)
7
Conceptual Design Industry State
of Practice: Applicability,
Deployability, and Need
•
Design
Exploration
Design
Evaluation
Projects
•  Incorporate work from six prior MATE
models
•  Standardize and collect functions
Model/
Simulation
Inputs
1
•  Research Questions
Context: “Engineering Systems Thinking”
Design
Ease of Change
Conceptual/
preliminary
Design
Academic Pursuits
From Weigel, 2002
Ross, Adam M., Nathan P. Diller, Daniel E. Hastings, and Joyce M.
Warmkessel. "Multi-Attribute Tradespace Exploration with Concurrent
Design as a Front-End for Effective Space System Design." Journal of
Spacecraft and Rockets 41, no. 1 (2004): 20-28.
To changes in desires:
Original
y
t
i
l
i
t
U
Revised
0.8
0.8
0.7
0.7
0.6
y
t
i
l
i
t
U
ΔReq.
0.5
0.5
0.4
0.4
0.3
0.3
0.2
40
42
44
46
48
50
52
Lifecycle Cost ($M)
54
56
58
60
Ross, Adam M., and Daniel E. Hastings. "The Tradespace Exploration
Paradigm." Paper presented at the INCOSE 2005 International
Symposium, Rochester, NY, July 10-15 2005 (Submitted).
0.6
0.2
40
42
44
46
48
50
52
Lifecycle Cost ($M)
54
56
58
60