No abstract

One of the important factors in the realization of economic and social development is energy. Especially in recent years due to rapid population growth and industrialization, the need for energy has gradually increased. However, due to globalization, competition between enterprises has become increasingly brutal. In order to survive and achieve a satisfactory profit margin in a globally competitive environment, businesses need to use resources effectively, achieve maximum output with minimum input, and effectively control costs by minimizing costs. In this respect, efficiency analysis to be conducted in enterprises is important both in evaluating the performance of enterprises and determining their position in the global competition environment. The purpose of this study is to measure financial performance and efficiency of energy businesses listed on Borsa Istanbul (BIST) in 2019 by using Data Envelopment Analysis (DEA). For this purpose, the efficiency of 8 businesses with the output-oriented Charnes-Cooper-Rhodes (CCR) model of DEA method was measured by using 2 input and 4 output factors obtained from financial statements. As a result of the study, 5 businesses operating in the energy market were found to be effective. Finally, the businesses that should be referenced in order to increase the efficiency levels of ineffective businesses were identified and the necessary potential improvement rates related to input and output variables were determined.

This study aims to examine cost stickiness between sales and sales costs and operating expenses in BIST manufacturing sector enterprises. 176 manufacturing companies were tested in four different models in three groups as small, large and one whole. The annual data of the companies for the period of 2010-2018 were analyzed in the SPSS statistics program. According to the findings obtained, while cost adhesiveness is not determined between Sales and Cost of Sales in one and two years period, it is determined that the costs are sticky in both periods and in all enterprises between Sales and Operating Expenses.

In today's world, customers demand more quality and affordable products with the dominant potential of customer-market-oriented marketing rather than business-production. Therefore, the enterprises which are the locomotives of the economy, have searched for new production techniques in order to meet these demands of the customers in the best way and to provide the highest efficiency with minimum input. As a result of this search, many new fertility techniques have emerged. Just in time production (JIT) system is one of these techniques, but its importance is increasing day by day. In order to reach the targeted sales and profitability levels and increase their productivity, companies should follow an effective cost policy due to the ruthless competition in the globalizing world, the changes and developments in technology and the fluctuations in the economy. Accordingly, JIT, which foresees the elimination of unnecessary elements and processes during production activities, is a system that aims to continuously improve production and production processes and minimize costs. JIT, whose basic philosophy is to minimize the intermediate stock level in the enterprises, reduces the fluctuations in demand and enables the production process to be realized effectively.