This chapter defines the nonfunctional requirements. For example, with the advent of cybersecurity in the last several years, security is a very important section of any system. This chapter will cover reliability, availability, maintainability, extensibility (scalability), and security. Security is not technically spelled with “-ility,” yet it is lumped in here. It is justified if the term ... [Show full abstract] became securibility, to coin a term. However, in interest of shorter and more understandable works, the text will use security, and you know it belongs in this chapter.