Estimating System of Systems Engineering (SoSE) Effort Jo Ann Lane, USC Symposium on Complex Systems Engineering January 11-12, 2007.

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Presentation transcript:

Estimating System of Systems Engineering (SoSE) Effort Jo Ann Lane, USC Symposium on Complex Systems Engineering January 11-12, 2007

2 Overview  SoSE Cost Modeling Background  Discussion: –Have appropriate size and cost drivers been defined? –What range of values should cost drivers assume?

3 System of Systems Engineering Software Engineering COCOMO II CostXpert CoStar Price-S SEER-SEM SLIM Systems Engineering COSYSMO COTS Integration COCOTS Hardware Engineering Price-H SEER-H Relationship of SoSE Cost Model to other Cost Models* * Barry Boehm, Ricardo Valerdi, Jo Ann Lane, and Winsor Brown, “COCOMO Suite Methodology and Evolution”, CrossTalk, April 2005.

4 System of Systems Cost Model Size Drivers Cost Drivers SoS Definition and Integration Effort Calibration COSOSIMO  Characteristics of SoSs supported by cost model –Strategically-oriented stakeholders interested in tradeoffs and costs –Long-range architectural vision for SoS –Developed and integrated by an LSI –System component independence  Size drivers and cost drivers –Based on product characteristics, processes that impact LSI effort, and LSI personnel experience and capabilities

5 Conceptual SoSE Effort Profile SoSE activities focus on three somewhat independent activities, performed by relatively independent teams A given organization may be responsible for one, two, or all activity areas Some SoS programs may have more than one organization performing SoSE activities

6 Planning, Requirements Management, and Architecting (PRA) Source Selection and Supplier Oversight (SO) SoS Integration and Testing (I&T) Size Drivers Cost Drivers SoS Definition and Integration Effort COSOSIMO Reduced Parameter Sub-Model Overview

7 Planning, Requirements Management, and Architecting Size Drivers # SoS-related requirements # SoS interface protocols Cost Drivers Requirements understanding Level of service requirements Stakeholder team cohesion SoS team capability Maturity of LSI processes Tool support Cost/schedule compatibility SoS risk resolution COSOSIMO: PRA Sub-Model SoSE PRA Effort

8 Source Selection and Supplier Oversight Size Drivers # independent component system organizations Cost Drivers Requirements understanding Architecture maturity Level of service requirements SoS team capability Maturity of LSI processes Tool support Cost/schedule compatibility SoS risk resolution COSOSIMO: SO Sub-Model SoSE SO Effort

9 SoS Integration and Testing Size Drivers # SoS interface protocols # SoS scenarios # unique component systems Cost Drivers Requirements understanding Architecture maturity Level of service requirements SoS team capability Maturity of LSI processes Tool support Cost/schedule compatibility SoS risk resolution Component system maturity and stability Component system readiness COSOSIMO: I&T Sub-Model SoSE I&T Effort