1. A method for optimizing TSLs (“target stock levels”) for an inventory of stock keeping units (“SKUs”), the method comprising: developing a service strategy for assigning a service level for each of the plurality of segments; analyzing the plurality of segments and the service levels for the plurality of segments for identifying at least one logistically distinct business (“LDB”); assigning each of the plurality of segments to a “best-fit” planning model for indicating deployment, replenishment, forecasting and review characteristics for the segments; and identifying a probability distribution function (“PDF”) for estimating a demand process of each of the plurality of segments.