When a defense company needed to create quality software, they brought representatives from the Quality Assurance (QA) group in to work with software and systems engineers. The QA group found that peer reviews were the best way to catch software bugs, and they shared their knowledge with the head of software engineering. Working together with the engineers, the QA group started a system of peer reviews and formal inspections, and together, the group decreased the number of problems in the software the company produced.