The Effect of Organizational Structure on Employees' Job Performance in Private Hospitals of Ahvaz

The success of any organization depends on its performance. Any organization, office, section, group, system, or institute has a responsibility andeach organization can be said that has been created to conduct the particular task. Performance is also an activity, which is both conducted to do that task and also the result of the activity, in fact performance is pure result of person’s attempt, affected and changed by his abilities and characteristics as well as his perception of the responsibility and other factors.This study aims to determine the effect of organizational structure (structural aspects) on employees’ job performance of a private hospital in Ahvaz. This research is applied in terms of goal, and based on the manner of collecting data; it is descriptive of correlation-survey type. Statistical population includes all employees in the mentioned hospital in June, 2016 as 589 people, in which sample volume was calculated as 239 employees using Cochran formula. Research tool is the Stefan Robbins questionnaire of 24 questions to measure organizational structure and Patterson questionnaire of 15 questions to evaluate job performance. To check the reliability of questionnaires, Cronbach’s alpha coefficient test was used, the value of which for organizational structure was obtained as 0.86 and for job performance as 0.81. To determine the validity, content validity was used. To analyze data, Pearson correlation coefficient, multi-variable regression and single-sample T, given data normalization, were used. The results indicate that organizational structure (structural aspects) has a significant negative effect on job performance of employees in a private hospital of Ahvaz. That means, as regulations and complexity in the level (vertical, horizontal, geographical), formality and organizational concentration is more, employees’ job performance reduces.