Material Economy and Logistics 9/2020

The aim of the paper is to present the mathematical model for the selection of the fleet acquisition strategy considering forklifts. The basis for the presented considerations constitutes the Make or Buy analysis, allowing for a decision if it should be a company's own, in-house fleet (bought, leased, credited), or outside one (short- or long-term rented). The discussed Make or Buy problem is extended in the paper to its Make and Buy version that takes into account mixed solutions, i.e. fleets composed of company's own and outside forklifts at the same time. All the above taking into account a total, annual fleet exploitation costs, including components specific for forklifts rental, where rental fees constitute fixed costs. The comprehensive mathematical model presented in the paper allows for the precise calculation of the indicated total, annual fleet exploitation costs. The paper is completed with a broad and detailed computational experiment presenting practical application of the model using a real-life input data. The detailed and precise conclusions concerning the selection of a forklift fleet acquisition strategy are drown as well.

Both in the scientific literature and in the observation of business practice, it should be stated that the increase in the share of the e-commerce market on a global scale generates not only business needs, but above all the need to conduct scientific research on improving logistics processes and supply chain information flow. The relatively long delivery time of the ordered goods, the complexity of customs and tax processes make it necessary to closely monitor the status of the realized transport. An additional problem preventing a comprehensive integration of the e-commerce goods supply chain is the different standards required in cross-border shipments in terms of customs or tax. The main aim of this article is to verify the available possibilities of monitoring and identification of goods in e-commerce shipments and the to look for possibilities of process improvements.

Due to the growing demand for electricity, it seems advisable to explore and use new sources of renewable energy. The most widely used renewable energy source is biomass. In addition to commonly used types of biomass, such as wood or energy crops, waste from the care of urban greenery, such as mowed grass, collected leaves, or wood waste, can be used for energy purposes. The aim of the paper is to present the possibilities of managing waste from the maintenance of urban greenery in Warsaw. In the paper the possible amount of obtained green waste as well as the energy potential of this biomass is estimated.

The subject of this paper is horizontal cooperation in logistics. This type of cooperation takes place by creating a common transport system in which all of its participants share the transport network and their resources. Horizontal cooperation between companies in the supply chain is an important research area because fierce competition in global markets, rising costs and increased customer expectations have resulted in a decrease in the profits of organizations. Involvement in horizontal logistics cooperation provides various opportunities to improve productivity and supply chain performance. However, forming alliances in the logistics industry involves taking up challenges that can be formulated as follows: What factors hamper cooperation?

The purpose of this paper is to analyze the determinants and barriers in the development of horizontal cooperation between logistics companies in supply chains. The method of literature analysis was used in the paper to verify the current level of knowledge concerning horizontal cooperation in supply chains. The expected research results will contribute to the systematization of knowledge concerning the implementation of cooperation in the logistics industry, which will improve the level of theoretical knowledge in the fields of economics, management and logistics. In addition, the results of the research may be used by decision-makers, researchers and organizations as a basis for designing and planning horizontal cooperation in supply chains, and also as a guide to conduct research on the current state of literature in a given field.

The lifecycle of rubber waste, based on the example of used tires is presented in this paper. The main focus is put on the methods of the waste management and further utilization. This is considered and described in details in relation to the situation in Poland over the period of 2015- 2017. The aim of the article is to propose new solutions that will allow to "control" the number of tires introduced to the market through legislative solutions. An analysis of the current way of managing used tires may allow for their better use and disposal. Complementary to the major considerations, the legislative conditions regarding the utilization of rubber waste are introduced (the status obligatory to 01.03.2020).