Studying the relationship between reciprocal services in the supply chain based on the gap model

The purpose of this study is to evaluate expectations and performance of logistic criteria in both supplier and company sections. For this purpose, South Zagros Oil and Gas Exploitation Company and its main suppliers have been selected as statistical population. A sample of 25 couple members were selected from this population and then key gaps were measured through paired comparison test in both direct and inverse manners through a questionnaire. In order to measure the relationship between inverse and direct gap, Pearson correlation coefficient was used. The result of this study revealed that there is no significant relationship between direct and revere gaps