In this study, the authors proposed Artificial Neural Network (ANN) as a decision making tool for India post service operational excellence, Karnataka, southern part of India. Though the concept of lean system bundles has been excellent results in the service sector, implementing in the postal service has been taken up as a new challenge. The performance has been validated based on Lean Service Practices (LSPs), Lean Workplace Environmental Practices (LWEPs), and Lean Social Practices (LSoPs) on Operational Performance (OP). Results can be deriving specific conclusions. As per our expectation, it is observed that ANN gives promising of ranking the decision making units. Here, we have used radial based function model. The expense of implementing lean was around INR 2 lakhs.