## 4 Case Study  
Agricultural production is facing increasing problems in terms of productivity, sustainability and competitiveness. In order to respond to these problems, it is necessary to transform agricultural production through the application of modern technologies that enable more efficient use of resources and better planning of agricultural production. Agriculture 4.0 represents progress in terms of this production through modernization with innovative equipment and machinery that enable more productive and efficient operations where equipment and machinery such as drone sensors, smart irrigation systems and automatic machines guided by GPS systems are used. In order to acquire and apply this technology in practice, it is necessary to have a reliable supplier who will provide quality equipment and machinery as well as service and other things that are needed by agricultural producers. The company MAMEX d.o.o. from Bijeljina was founded in 2007 and was engaged in the purchase of vegetables from producers in Semberija region of Bosnia and Herzegovina and their export to other countries. In order to increase efficiency and improve competitiveness, in 2010, it invested in greenhouse production, building 30 greenhouses on three hectares of land. Nowadays, MAMEX produces 1800 tons of cucumbers, peppers, lettuce, spinach, beets, garlic and potatoes, and purchases 2800 tons from local producers. About 20% of the products are exported, while the rest are sold through sales channels in Bosnia and Herzegovina. In order to improve its production and business, the company launched a processing business where they produced food products from vegetables. In order to further improve its business and improve competitiveness, MAMEX decided that it needed to improve its agricultural production by applying elements of the Agriculture 4.0 system. The constant desire to increase efficiency, productivity and product quality has led MAMEX to acquire and maintain modern equipment--from irrigation systems and climate control in greenhouses to packaging and processing equipment as well as the use of automated machinery. Given the complexity of the company's business, which is reflected in the purchase of vegetables and the production of food products, it is necessary to have a reliable and flexible supplier of equipment and machinery. The selection of supplier is a strategic decision for MAMEX. Therefore, this company needs a supplier who will be a strategic partner of this company on which it can rely. In order to select this supplier, MAMEX selected five DMs who will evaluate the criteria and the supplier, as follows:  
* The first DM manages all strategic segments of the business and makes decisions. He was selected because he has the broadest insight into the company's work and has many years of experience in cooperation with suppliers. * The second DM is in charge of monitoring costs. He was selected because his role is directly related to the economic criteria of this study. * The third DM deals with maintenance and manages equipment and machinery. He was selected because he has the largest number of points of contact when it comes to the procurement of these goods. * The fourth DM organizes greenhouse production and supervises the equipment used. He was selected because he has knowledge of the work processes in agricultural production. The fifth DM monitors productivity and trains new workers. He was selected because he can assess how simple the equipment and machinery is and how it contributes to agricultural production. MAMEX, with the assistance of the selected supplier, will enable the increase in productivity and efficiency of agricultural production and improve the competitiveness of the company through the development of sustainable production. In order to select a supplier, it is first necessary to determine the criteria with which suppliers will be evaluated.