Banana is a climacteric fruit that undergoes a ripening process in airtight chambers at a certain temperature, appropriate ethylene concentration, and the time it takes for the fruit to reach maturity level 4 on the ripening scale. For commercial purposes an ethylene concentration of 1000 ppm is used, and depending on other factors the concentration may vary. Through a research the best result has been achieved with an ethylene concentration of 900 ppm and the fruit exposure to 18C for a treatment period of 120 h. These parameters reduced costs by RSD 91.896,95 at annual level compared to the commercial concentration of ethylene, the quality of the fruit did not deteriorate greater efficiency in business has been achieved.

The task of the communal police is primarily reflected in the provision of assistance and services that have their own specifics. When it comes to the communal police in the Republic of Serbia, in that case the duties are reflected in the performance of supervision and control in accordance with the legal authorizations of the city regulations. Accordingly, the communal police, by performing tasks within their jurisdiction, ensures the performance of tasks within the jurisdiction of the City of Zajecar, in the areas of communal activities, environmental protection, people and goods, protection and maintenance of order in the use of land, space, local roads, streets and other public facilities, as well as the unhindered performance of certain tasks within the jurisdiction of the city, and so forth. Having in mind the specifics of the communal police, the aim of the research is to show the efficiency of the work of the Communal Police when providing assistance (2014-2019) through a systematic approach to the processing of data from archival materials, on the example of the service provided to the city authorities, which refers to providing assistance to PC Parking Service Zajecar.

The research was designed as a cross-sectional study in two time periods (2014 and 2019) on a selected sample in 12 cities of the Republic of Serbia. It aims to find out about the level of job satisfaction of employees in the municipal police (Official Gazette of the RS, No. 51/2009) - militia (Official Gazette of the RS, No. 49/2019). In order to obtain valid results from the respondents, the measurement of the degree of satisfaction was carried out by means of an anonymous standardized questionnaire for measuring job satisfaction - Job Satisfaction Survey (JSS). The collected data were processed by Descriptive statistical analysis (Macura, Kovacevic, 2018), determined is medium value, relationships and connections with categorical by division on the subscales and total scales For pleasure by work: dissatisfied, ambivalent and satisfied. T test of independent samples performed is a comparison of mean values on the job satisfaction scale and all its subscales. Standard multiple regression analysis of certain is mutual and influence and statistics the significance of the set variables on Employee Job Satisfaction. The results showed a statistically significant influence between the subscales on the job satisfaction scale, where the greatest influence on employee dissatisfaction in 2014 was the salary, promotion, benefits, rewards and the very nature of the job. The greatest influence on employee ambivalence was satisfaction with work procedures and satisfaction with communications in 2014, while in 2019 the greatest influence on employee ambivalence was satisfaction with co-workers, rewards, the very nature of work and communication.

Communal systems, as organizational units within local self-governments, are important factors in the organizational and executive structure of modern administration. Management has an important role with its supporting structures (finance and human resources) in every economy and business of the organization. Managing communal police is a difficult and demanding job, which requires a lot of knowledge, skills, understanding and experience in working with people. In practice as well as scientific research on work, it has been shown that joint work is always more efficient and effective than individual work. Numerous management theories have contributed, each in its own way, to improving the understanding of the factors that affect the efficiency of the organization as well as the motivation and satisfaction of employees on whom business efficiency directly depends. Since the work of communal police officers is work in pairs or in groups, the important role of the manager is to organize communal police officers and focus on solving the set tasks. As far as the authors know, there is no research regarding management process of the communal police in Serbia, therefore, the main goal of the paper is to present the management process of the communal police of the City of Zaječar.