The Areas of Business Analysis Knowledge

enterprise analysis	The enterprise analysis knowledge area involves the environment of the organization at large. These are high-level influences. The outputs from this knowledge area are the basis for decision-making throughout planning and requirements gathering.
requirements planning and management	The outputs from the requirements planning and management knowledge area are informational. Information is exchanged between this area and the requirements gathering areas. This is when the requirements are formed and made real. As this information is refined it eventually becomes part of fully formed, clearly defined requirements.
requirements gathering areas	The requirements gathering areas consist of requirements elicitation, requirements analysis and documentation, and solution assessment and validation. The information gleaned from stakeholders is exchanged with other areas, most particularly requirements planning.
requirements communication	The requirements communication area involves the transfer and exchange of information for the purpose of reaching a common understanding between stakeholders.