This brief paper by Linda Westfall defines the defect metric of Defect Density and gives two examples of how it can be reported and utilized.

This technical paper describes a scalable strategy that integrates multiple techniques into a pragmatic test-design approach that honors budget and schedule constraints. The strategy is most appropriate for large sets of behavior rules and logical interpretations, where exhaustive testing is not feasible. Ultra-understandable decision tables and their supporting entity profiles are used to describe behavior, but the design strategy can be applied to any equivalent information model. The scalable design process comprises five steps.

In October 1997, the US National Institute of Standards and Technology (NIST) initiated an effort to increase the visibility of software usability. Cooperating in the IUSR project are prominent suppliers of software and representatives from large consumer organizations. The goals of the initiative are: 

1. Encourage software suppliers and consumer organizations to work together to understand user needs and tasks.
2. Develop a common usability reporting format for sharing usability data with consumer organizations.
3. Conduct a pilot trial to determine how well the usability reporting format works and to determine the value of using this format in software procurement.

This site provides an overview of the project, who is involved and white papers on progress to date. Further, there is a common industry format template and guideline for conduction and reporting on usability assessments.

This template is a generic risk assessment form. It can be adapted to meet your specific needs.