This document discusses the evolution of shared services at Aircel. It notes that previously, the 23 circles were doing similar activities differently, with control gaps and inefficiencies. Aircel implemented standardized processes and clearly defined roles and responsibilities to mitigate risks and add value to the business. The shared services model expanded capabilities from transaction processing to include knowledge process outsourcing and centers of excellence while ensuring integrity of financial reporting through monitoring, automation, and compliance controls. Key learnings included taking a phased approach, rigorous handovers between teams, planning resources in advance, and maintaining quality and communication.