COCOMO 1 Model:
The Constructive Cost Model was first developed by Barry W. Boehm. The model is for estimating effort, cost, and schedule for software projects. It is also called as Basic COCOMO. This model is used to give an approximate estimate of the various parameters of the project. Example of projects based on this model is business system, payroll management system and inventory management systems.
COCOMO 2 Model:
The COCOMO-II is the revised version of the original Cocomo (Constructive Cost Model) and is developed at the University of Southern California. This model calculates the development time and effort taken as the total of the estimates of all the individual subsystems. In this model, whole software is divided into different modules. Example of projects based on this model is Spreadsheets and report generator.
Difference between COCOMO 1 and COCOMO 2:
|COCOMO I||COCOMO II|
|COCOMO I is useful in the waterfall models of the software development cycle.||COCOMO II is useful in non-sequential, rapid development and reuse models of software.|
|It provides estimates pf effort and schedule.||It provides estimates that represent one standard deviation around the most likely estimate.|
|This model is based upon the linear reuse formula.||This model is based upon the non linear reuse formula|
|This model is also based upon the assumption of reasonably stable requirements.||This model is also based upon reuse model which looks at effort needed to understand and estimate.|
|Effort equation’s exponent is determined by 3 development modes.||Effort equation’s exponent is determined by 5 scale factors.|
|Development begins with the requirements assigned to the software.||It follows a spiral type of development.|
|Number of submodels in COCOMO I is 3 and 15 cost drivers are assigned||In COCOMO II, Number of submodel are 4 and 17 cost drivers are assigned|
|Size of software stated in terms of Lines of code||Size of software stated in terms of Object points, function points and lines of code|
Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.
- Software Engineering | COCOMO Model
- Software Engineering | COCOMO II Model
- Software Engineering | Application Composition Estimation Model (COCOMO II | Stage 1)
- Early Design Model : COCOMO-II
- Difference between Time Tracking and Time and Attendance Software
- Difference between SFA and CRM
- Difference between IAAS, PAAS and SAAS
- Difference between Frontend Testing and Backend Testing
- Difference between Waterfall Model and Spiral Model
- Difference between Waterfall model and Incremental model
- Difference between V-model and Waterfall model
- Difference between Alpha and Beta Testing
- Difference between Black Box Testing and Gray Box Testing
- Difference between Unit Testing and Integration Testing
- Difference between Static and Dynamic Testing
- Difference between RAD Model and Waterfall Model
- Difference between Performance and Stress Testing
- Difference between System Testing and Acceptance Testing
- Difference between Forward Engineering and Reverse Engineering
- Difference between Cost Performance Index (CPI) and Schedule Performance Index (SPI)
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.