You may need to calculate the size of a piece of software (existing or to be designed) for many reasons. It is crucial, for a software project to succeed or to know the assess the software assets of your company, to get a reliable estimate of the software size, and, by all means, a suitable software sizing method.
Indeed, the software sizing method you choose must be compatible with your needs, your objectives and the resources that are available. For instance, you should choose different methods if you are just starting your project or if the piece of software has already been completed.
That white paper is a comparative study of existing methods that are, for most part, standard and worldwide spread. The comparison is based on several criteria such as : the ease of learning, the counting speed, the reliability, the detail level of the requirements.
The methods included in that comparative study are:
- By comparison with past projects
- By analogy with macro components
- Early&Quick FP
- Early&Quick COSMIC
- IFPUG (average complexity)
- IFPUG 4.3
- COSMIC 4.0
- SiFP 1.1
Happy reading !
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