Ultimately, methodologies are not religions; they are tools. The hammer does not judge the nail, and the business analyst should not judge the methodology. The only true failure is not the choice of Waterfall or Agile, but the refusal to choose any method at all—leaving the business to drift on intuition while competitors sail on process. The BA's legacy is not the methodology they used, but the problems they solved and the value they created.
: Uses diagrams (often BPMN) to map out business processes and find bottlenecks. business analyst methodologies
: A root cause analysis method that involves asking "Why?" five times to get past symptoms to the core issue. Ultimately, methodologies are not religions; they are tools