Cosysmo
Encyclopedia
The Constructive Systems Engineering Cost Model (COSYSMO) was created by Ricardo Valerdi while at the University of Southern California
Center for Software Engineering. It gives an estimate of the number of person-months it will take to staff systems engineering resources on hardware and software projects. Initially developed in 2002, the model now contains a calibration data set of more than 50 projects provided by major aerospace and defense companies such as Raytheon
, Northrop Grumman
, Lockheed Martin
, SAIC
, General Dynamics
, and BAE Systems
.
Similar to its predecessor COCOMO
, COSYSMO computes effort (and cost) as a function of system functional size and adjusts it based on a number of environmental factors related to systems engineering.
COSYSMO's central cost estimating relationship, or CER is of the form:
where "Size" is one of four size additive size drivers, and EM represents one of fourteen multiplicative effort multipliers.
University of Southern California
The University of Southern California is a private, not-for-profit, nonsectarian, research university located in Los Angeles, California, United States. USC was founded in 1880, making it California's oldest private research university...
Center for Software Engineering. It gives an estimate of the number of person-months it will take to staff systems engineering resources on hardware and software projects. Initially developed in 2002, the model now contains a calibration data set of more than 50 projects provided by major aerospace and defense companies such as Raytheon
Raytheon
Raytheon Company is a major American defense contractor and industrial corporation with core manufacturing concentrations in weapons and military and commercial electronics. It was previously involved in corporate and special-mission aircraft until early 2007...
, Northrop Grumman
Northrop Grumman
Northrop Grumman Corporation is an American global aerospace and defense technology company formed by the 1994 purchase of Grumman by Northrop. The company was the fourth-largest defense contractor in the world as of 2010, and the largest builder of naval vessels. Northrop Grumman employs over...
, Lockheed Martin
Lockheed Martin
Lockheed Martin is an American global aerospace, defense, security, and advanced technology company with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in Bethesda, Maryland, in the Washington Metropolitan Area....
, SAIC
Science Applications International Corporation
SAIC is a FORTUNE 500 scientific, engineering and technology applications company headquartered in the United States with numerous federal, state, and private sector clients...
, General Dynamics
General Dynamics
General Dynamics Corporation is a U.S. defense conglomerate formed by mergers and divestitures, and as of 2008 it is the fifth largest defense contractor in the world. Its headquarters are in West Falls Church , unincorporated Fairfax County, Virginia, in the Falls Church area.The company has...
, and BAE Systems
BAE Systems
BAE Systems plc is a British multinational defence, security and aerospace company headquartered in London, United Kingdom, that has global interests, particularly in North America through its subsidiary BAE Systems Inc. BAE is among the world's largest military contractors; in 2009 it was the...
.
Similar to its predecessor COCOMO
COCOMO
**********************************************************************************************The Constructive Cost Model is an algorithmic software cost estimation model developed by Barry W. Boehm...
, COSYSMO computes effort (and cost) as a function of system functional size and adjusts it based on a number of environmental factors related to systems engineering.
COSYSMO's central cost estimating relationship, or CER is of the form:
where "Size" is one of four size additive size drivers, and EM represents one of fourteen multiplicative effort multipliers.
See also
- Comparison of development estimation softwareComparison of development estimation softwareA comparison of notable Software development effort estimation software.-See also:* Software Sizing* Software metric* Software development effort estimation* Software parametric models* Cost estimation models...
- Software development effort estimationSoftware development effort estimationSoftware development efforts estimation is the process of predicting the most realistic use of effort required to develop or maintain software based on incomplete, uncertain and/or noisy input...
Further reading
- Valerdi, R., Boehm, B., Reifer, D., COSYSMO: A Constructive Systems Engineering Cost Model Coming Age, 13th INCOSE Symposium, July 2003, Crystal City, VA.
- Valerdi, R., The Constructive Systems Engineering Cost Estimation Model (COSYSMO), University of Southern California, May 2005.
- Valerdi, R., The Constructive Systems Engineering Cost Model (COSYSMO): Quantifying the Costs of Systems Engineering Effort in Complex Systems, VDM Verlag, 2008.