The methodology involves four iterative stages: 1) Inception to scope KPIs, processes, and approach. 2) Planning categorizes processes and develops execution plans. 3) Design and implementation. 4) Rollout and control. The planning stage assesses process outsourcing, IT systems, quality, sequence, and reengineering to categorize stages and develop execution plans. The methodology aims to incrementally improve KPIs and processes across the organization through iterative stages.