SAN FRANCISCO, USA: Coverity, Inc., the leader in development testing, released today the 2011 Coverity Scan Open Source Integrity Report (Scan).

This report is the result of the largest public-private sector research project focused on open source software integrity, originally initiated between Coverity and the U.S. Department of Homeland Security in 2006, and currently owned and managed by Coverity.

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According to the release, In 2011, open source projects in Coverity Scan were upgraded to the Coverity 5 development testing platform analysis engine to accommodate significant advances of the maturity in static analysis technology over the past five years - in particular, the ability to find more new and existing types of defects in software code.

The 2011 Scan report details the analysis of Scan's most active open source projects, totaling over 37 million lines of open source software code. In addition, the report details the results of over 300 million lines of proprietary software code from a sample of anonymous Coverity users.

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Key findings from the 2011 Scan report include:

* Over 37 million lines of code from forty-five of the most active open source projects in Scan were analyzed. The average open source project in Scan has 832,000 lines of code. The average defect density, or the number of defects per thousand lines of code, across open source projects in Scan is .45.

* Over 300 million lines of code from forty-one proprietary codebases of anonymous Coverity users were analyzed. The average proprietary codebase has 7.5 million lines of code. The average defect density for proprietary codebases of Coverity users is .64.