This lesson covers the importance of quality control policies and requirements that CPA firms must adhere to when selecting and working with clients. It emphasizes the responsibility of the firm to have a well-established system of quality control procedures that aim to minimize the likelihood of client associations with those lacking integrity. Though a firm may not have an appropriate system of quality control, it can still be in compliance with professional standards when it comes to individual engagements. The lesson also addresses the different factors, such as firm size and cost-benefit analysis, affecting the nature and extent of a CPA firm's quality control procedures. Nick Palazzolo, CPA, shares his experience working with both large and small firms and how the size of the firm affects the implementation of quality control procedures.