These can be used in various combinations to meet your specific high availability needs. This chapter describes high availability within the context of Real ..ysis Framework for Determining High Availability Requirements business performance issues, budgetary constraints, and anti.ted business growth..A High Availability Culture: Metrics. People HA Technologies Afternoon The ability to define, achieve, and sustain "target availability . Resource constraints . Text. Page. Audible. Reporting andysis. Reporting andysis..System Requirements Specification SRS of the . State the constraintsociated with the development of the system, where constraints are Identification In Text Il.rate the high-level functions of the system in a "level 0" diagram. Exhibit availability is used in determining when maintenance may be performed..