This is a list of methodologies that are either directly involved in the Business Analysis practice or closely related. Often a Business Analyst must play dual roles within a project or business setting and having an understanding of these methodologies is often a critical factor to success.
Business Analysis Body of Knowledge – BABOK (IIBA)Business Analysis
Business Analysis Practice Guide (PMI)Business Analysis
Business Analysis Process Framework (Bridging the Gap)Business Analysis

The Business Analysis Process Framework has been defined by Bridging the Gap as a method of delivering high quality outcomes through structured Business Analysis.

Kotter’s 8-Step Process for Leading ChangeChange Management
Prosci ADKAR change modelChange Management
Requirements Modeling Language (Seilevel)Business Analysis
Systems Development Life CycleSystem Implementation