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Tuesday, July 30, 2013

PPT On COSTAR Software Estimation Tool

Presentation On COSTAR Software Estimation Tool

COSTAR Software Estimation Tool Presentation Transcript:

2.What is COSTAR ?       
Costar is a software estimation tool based on the Constructive Cost Model (COCOMO) described by Barry Boehm in his books Software Engineering Economics and Software Cost Estimation with COCOMO II.
 Costar  lets you make trade-offs and experiment with "what-if" analyses to arrive at the optimal project plan.

3.What does COSTAR do ?
Software project managers use Costar to produce estimates for :-
Project Duration
Staffing Levels

4.Why use COSTAR?
COSTAR is a faithful implementation of the COCOMO model that is easy to use on small projects, and yet powerful enough to plan and control large projects.
COSTAR estimates are more objective and repeatable than estimates made by methods relying on proprietary models.
COSTAR can calibrated to reflect the software development environment, and to produce more accurate estimates.

Costar allows you to define a software structure to meet the needs.
Initial estimate is made on the basis of a system containing some thousand lines of code.
Second estimate is more refined as the system will consist of two subsystems and the user will have more accurate idea of the lines of code contained in each of the subsystems.
Costar permits the user to continue this process until the needs of the user are met.

Uses standard models
Traditional COCOMO
Intermediate COCOMO
Detailed COCOMO
Incremental COCOMO

7.The tool can store multiple estimates that can be compared and can also be used for ‘what-if’ analysisIt is calibrated using organization's historic data.
Uses calibration tool called CALICO.

Calibration tool.
Input is data on completed projects.
Uses linear regression on these to calibrate COCOMO equations to match user’s environment.

9.For anything meaningful , data should include at least half a dozen projects – each with data on size, effort, duration and cost drivers. Costar then automatically uses these new calibrated equations instead of standard estimating equations.

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