Size is one of the most important attributes of a software product. It is not only the key indicator of software cost and time but also a base unit to derive other metrics for project status and software quality measurement. Size metric is used as an essential input for most of cost estimation models such as COCOMO, SLIM, SEER-SEM, and Price-S.
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Although source lines of code or SLOC is a widely accepted sizing metric, there is a lack of standard that enforces a consistency of what and how to count SLOC. Ensuring consistency across independent organizations in the rules used to count software cost code is often difficult to achieve. To that end, the USC Center for Systems and Software Engineering (CSSE) has developed and released a code counting toolset called CodeCount to support sizing software code for historical data collection and reporting purposes. This toolset is a collection of tools designed to automate the collection of source code sizing information. It implements the popular code counting standards published by the Software Engineering Institute (SEI) and adapted by COCOMO. Logical and physical SLOC are among the metrics generated by the toolset.