For more information, please visit: http://seari.mit.edu

A Framework for System of Systems Tradespace ExplorationDebarati Chattopadhyay, SM in Aeronautics and Astronautics (expected June 2009)

Advisors: Dr. Donna Rhodes, Dr. Adam Ross

Biography

Debarati Chattopadhyay is a graduate student at MIT pursuing a Masters degree in Aeronautics and Astronautics. Debarati has B.S. degrees in Computer Engineering (2005) and Astrophysics(2004) from Lehigh University. She has worked in mission operations for the Chandra X-ray Observatory at the Harvard-Smithsonian Center for Astrophysics.

© 2008 Massachusetts Institute of Technology

Related Publications

Chattopadhyay, D., Ross, A.M., and Rhodes, D.H., “A Framework for Tradespace Exploration of Systems of Systems”, 6th Conference on Systems Engineering Research, Los Angeles, CA, April 2008.

References

Maier, M.W., "Architecting Principles for Systems-of-Systems", Systems Engineering, Vol. 1, No. 4, pp. 267-84, 1998.

DoD, "4.2.6. System of Systems Engineering," In Defense Acquisition Guidebook, Department of Defense, 2004.

Ross, A.M., and Rhodes, D.H., "Architecting Systems for Value Robustness: Research Motivations and Progress," Annual IEEE Systems Conference, Montreal, Canada, April 2008.

SoS MissionSoS MissionNew SystemsNew Systems

SoS AttributesSoS Attributes

SoS DVSoS DV

Legacy SystemsLegacy Systems

Interfaces Interfaces

Estimate of Managerial Control and Influence

Level of Each Component

Estimate of Managerial Control and Influence

Level of Each Component

SoSA SoSB SoSC

U

0

Epoch 1 Epoch 2 Epoch 3 Epoch n

…S1,b S1,e S2,b S2,e S3,b S3,e Sn,b Sn,e

T1 T2 T3 Tn

Time

U

0

Epoch 1 Epoch 2 Epoch 3 Epoch n

…S1,b S1,e S2,b S2,e S3,b S3,e Sn,b Sn,e

T1 T2 T3 Tn

Time

System Era

Select Value Robust Design

Incentive Plan for

Legacy Components

Design New Systems

and Interfaces

Dynamic Epoch-Era Analysis

Dynamic Epoch-Era Analysis

Epoch Static Tradespace for Each Type of Context

Era String of epochs

Legacy

New

ImplementationImplementation

Context Change

uti

lity

cost

Generate SoS Tradespace

Generate SoS Tradespace

SoS TradespaceSoS Tradespace

Revise Estimates

Proposed Framework for SoS Tradespace Exploration

1.What are the characteristics that distinguish SoS design from traditional system design?

2.What is a practical framework for SoS tradespace exploration?

3.How can the developed tradespace exploration framework be used to select SoS designs that are value robust through the SoS lifetime?

SoS Specific Considerations

Research Questions

SoS is defined as a set or arrangement of systems that results when independent and useful systems are integrated into a larger systems that delivers unique capabilities. (DoD 2004)

Anticipated Contributions

• Validate Dynamic Multi-Attribute Tradespace Exploration (MATE) as a basis for a framework for SoS tradespace exploration

• Provide a framework for testing SoS design heuristics suggested in literature

• System of Systems design requires sophisticated decision making under high uncertainty to ensure selection of designs that maintain value over the operational lifetime

• A quantitative method is necessary to compare SoS design alternatives and understand the tradeoffs between diverse stakeholder preferences.

What is a SoS?

Design of future SoS will require quantitative concept exploration methods to improve SoS selection decisions

Motivation

Multi-Concept Responsive Disaster Surveillance

Multi-Concept Responsive Disaster Surveillance

Chandra

User

Coordinating ObservatoriesCoordinating Observatories

Aircraft

UAV

Satellite

A system-of-systems (SoS) is a set of collaboratively integrated systems that possess two additional properties: operational independence of the components and managerial independence of the

components. (Maier 98)

HST

componentsystem

componentsystem

componentsystem

SoS

global stakeholders

local stakeholder

s

local stakeholder

s

local stakeholder

s

Managerial Control (MC) Influence

Gap

Likelihood of Participation0 1

Effective Managerial Authority

Local and Global Stakeholder Sets

Legacy and New Systems

Dynamic Composition

Local and Global Stakeholder Sets

Legacy and New Systems

Dynamic Composition

Consider managerial authority during SoS

design

Study SoS value delivery over time, accounting for

dynamic composition

Consider managerial authority during SoS

design

Study SoS value delivery over time, accounting for

dynamic composition

Legacy Systems

New Systems

Legacy Systems

New Systems

Legacy Systems

New Systems

SoSA SoSB SoSN

T1 T2 TN

...

Time-Varying Available Component Sets

component systems

Time

Switching Cost