Nowadays, regardless of what industry they are in, all organizations and managers are vigorously pursuing success, and the basic touchstone to achieve success in any organization, particularly a commercial organization, is having satisfied and loyal customers. Nonetheless, this ideal condition would never be met unless the organization enjoys a team of loyal staff. That is to say keeping satisfied and loyal customers will only be feasible in case of having satisfied and loyal staff, seeing that it is the latter who play the key role in conferring value to the organization and earning the loyalty and consent of the former. This study aimed at evaluating the role of employee loyalty in the success of commercial organizations in the field of heavy equipment dealerships. To this end, data was collected through library resources as well as a survey. The sample was comprised of 280 employees of heavy equipment dealerships and 280 customers who had referred to these dealers. This study involved 7 hypotheses, which were analyzed and checked through Pearson Correlation Coefficient and Regression. The findings show that organizational successful directly affected by loyalty of staff. Besides, positive correlations were reported between employee loyalty and services quality, between services quality and customer satisfaction and loyalty as well as between customer satisfaction and loyalty and success of organizations.

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The purpose of this study is to predict the knowledge sharing behavior in the organizational health of public universities in Tehran. The population included employees of Shahid Beheshti, Tarbiat Modarres, Amir Kabir, and Kharazmi universities located in Tehran. For this purpose, a sample size of 320 of employees based on Morgan's table was selected through proportional stratified random sampling and responded to the organizational health and knowledge sharing questionnaire. Research method is quantitative and descriptive and correlational in terms of data collection and objective. In order to analyze the obtained data, statistical methods of regression, correlation coefficient, multivariate data analysis, and measurement tools of SPSS, PLS were used. The results showed that, the observed r at the level of p <0.05 indicated a significant positive correlation between knowledge sharing and organizational health of the public universities' employees in Tehran. This study supports the idea that knowledge sharing and its dimensions as a strong predictor largely influences organizational health.