This tutorial explains in detail what COQ is; costs of good and poor quality, cost of quality formula, examples, as well as ways to improve quality to optimize COQ:
Demands of the competitive global economy have placed a strong emphasis on quality across the IT industry.
In recent years, IT has been supporting the business in many ways and so its activities are being scrutinized by business executives in terms of added value i.e. larger profit margins, lower operational costs, faster software product delivery, etc.
The cost of quality in software development is a metric that could aid in turning software into a profitable tool for companies. Companies are looking at ROI i.e., the return to the organization from investment in software development.
Quality is gained at a price and the cost is called COQ or Cost of Quality.