Service-level requirements emerge among the alternative strategies for supply chain firms that have already harvested the benefits of adopting ever low system wide costs. Though, the subjective and ever changing nature of services related understandings creates a challenge. In an attempt to fill this gap, our recent work presents an expert system approach, ESSER (Expert System Application for Suppliers to Improve Service-Levels) as a decision support mechanism for helping supplier firms to tailor their service offerings in order to meet updated service level requirements of their individual buyers.