Background and Aim: Employees suggestion plan (ESP) is designed to encourage and improve employees’ participation in developmental planning. The establishment of this system needs cultural, individual and structural preparedness. This study is aimed to determine organizational preparedness in Tehran University of Medical Sciences (TUMS).

Materials and Methods: This research was a cross-sectional, descriptive and analytical study conducted in TUMS headquarters in Tehran, Iran. The heterogeneous sample of this study consisted of 155 employees. They were asked to fill out a researcher-made questionnaire to assess their attitude towards organizational preparedness for ESP establishment. The validity and reliability of the questionnaire were confirmed. The data were analyzed by SPSS, and descriptive results were presented. The data were also analyzed by Friedman and ANOVA statistical methods.

Results: Most of the employees had a positive attitude towards the existence of individual and cultural preparedness for ESP establishment in TUMS. However, they believed the desired structural preparedness for this process did not exist.

Conclusion : The desired organizational preparedness for ESP establishment exists in TUMS, although structural preparedness is not desirable. Therefore, it is suggested that necessary modifications should be made in TUMS organizational structure for effective ESP implementation.