Proposed modification to COSYSMO estimating relationship

Gan Wang, Ricardo Valerdi, Barry Boehm, Alex Shernoff

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This paper proposes a modification to the Academic COSYSMO estimating relationship to remedy a critical limitation in its current implementation of the cost drivers. The effort multipliers defined for these drivers have an overdramatic impact on the nominal effort, which unrealistically amplifies or compresses the effort estimate. This problem severely limits its practical applications. The newly proposed parametric relationship is inspired by the COCOMO II modeling approach and based on the considerations of the life cycle impact of the cost drivers. Two additional cost drivers are also introduced. The feasibility of the new model definition is examined with a boundary analysis and validated by the analysis of historical data. This work is based on the practical implementation of COSYSMO at BAE Systems. In this paper, we present (1) an analysis of the problem with the current COSYSMO model definition; (2) a proposal of two new cost drivers added to the current fourteen cost drivers; (3) an analysis of life cycle impact of the cost drivers and a division of the drivers based on the impact; (4) the modified COSYSMO parametric relationship; (5) validation of the modified COSYSMO relationship through an analysis of historical data; and (6) conclusion and suggestion of future work.

Original languageEnglish (US)
Title of host publication18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008
Pages2473-2485
Number of pages13
StatePublished - Dec 1 2008
Externally publishedYes
Event18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008 - Utrecht, Netherlands
Duration: Jun 15 2008Jun 19 2008

Publication series

Name18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008
Volume4

Other

Other18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008
CountryNetherlands
CityUtrecht
Period6/15/086/19/08

ASJC Scopus subject areas

  • Hardware and Architecture
  • Information Systems
  • Control and Systems Engineering

Fingerprint Dive into the research topics of 'Proposed modification to COSYSMO estimating relationship'. Together they form a unique fingerprint.

  • Cite this

    Wang, G., Valerdi, R., Boehm, B., & Shernoff, A. (2008). Proposed modification to COSYSMO estimating relationship. In 18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008 (pp. 2473-2485). (18th Annual International Symposium of the International Council on Systems Engineering, INCOSE 2008; Vol. 4).