What is it more important – the development plan or user's desire? Stabilization or development? And can there is no need to separate all this? We will consider concepts and the principles of Production Quality, quality management tools, approaches to processing of user's addresses and feedback, the rule of golden section, the relation to quality control at the different levels of development and deployment. And also we will consider what theoretical bases, metrics, methodologies and other can find practical application on the example of the Wargaming Saint-Petersburg Release Team.