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For the multiproduct EOQ-models the analysis of several vehicles deliveries feasibility factoring in vehicle capacity is conducted. It is proved that such deliveries with an increase in the number of vehicles that simultaneously used for a single delivery cannot be effective, if a discount is not given for the cost of such a delivery. The necessary and sufficient condition that sets the threshold level of the discount, at which the deliveries by several vehicles are able to compete with the traditional solutions, is established. The cases of numerical calculations are presented in the article.
Modification of the inventory management EOQ-model factoring in the temporary value of money (TVM) and an advance payment of the order on the basis of the credit is given in this article. Its purpose is to present for the managers an appropriate modification of the EOQ-formulas for such models (both for deliveries of one nomenclature of goods, and for multinomenclature deliveries). Usage of these modifications will allow to increase the efficiency of deliveries by taking into account the specificity of appropriate cash flows, if optimisation takes into account TVM (by the scheme of simple interest). Accepted that all payments are being realised from the revenue of the previous delivery. The necessary and sufficient condition for a possibility of such payments is established. The interest rate for factoring in the TVM reflects profitability of working capital of the modelled supply chain. It is defined in a format of the model. It is noted that the optimisation of the models of this type relate with the synergetic effect of increasing the profitability of working capital.
A problem of the designing of rational distribution network for a retail industry is observed in the article. The principle of rationality of a distribution network is described as a connection between a distribution network design and goals / requirements of a corporate strategy with a breakdown by different formats, sales regions and product categories.
Variety of inventory management models known in logistics theory. Design of models for inventory management in a multi-level inventory placement systems are popular field of studies nowadays. One such model is Sven Aksater’s model. Like most models, it is applicable in cases where all the main parameters – demand per day, delivery time, the volume of orders, delay in logistic cycles and etc. – are deterministic. Obviously, in practice these parameters are random variables. The article presents two models for the economic order quantity calculation for two-leveled supply placements system, taking into account safety stocks and deficit at different levels, depending on the inventory management strategy – with fixed order amount or fixed time interval between adjacent orders.
For the multinomenclature EOQ reserve control model with renting storage space and delayed payment for the orders, we propose an approach to optimization that accounts for the temporal value of money. We estimate the influence of these delays both on the parameters of the optimal control strategy and on the efficiency of using floating capital. The study has been done for situations when the said delays let one pay for orders from the revenue on repeat order intervals. We establish a necessary and sufficient condition imposed on the duration of delays that guarantees that this order payment from the revenue is possible. We illustrate characteristic features of optimization procedures with numerical computations.
Russian companies intend to be among leaders in the international logistics world in order to attract financial investments and labor force. Being monitored on a regular basis by the World Bank the Russian Federation is compared with other countries via several logistics performance indicators which are focused mainly on the evaluation of the speed of flows movement within the supply chains of a country. Therefore, to strengthen the position of domestic companies on the international scene, there are latent opportunities in material flow management. The research extends main review inventory policies transforming main parameters of widely used models in the context of customers’ requirement satisfaction. For this purpose the methods of economic, mathematic and statistics approached are implemented. The comparison of five various environmental conditions, among which are the prohibition of stock out, the provision of items available on stock, consideration of the balance between holding and shortage costs, influence of out-of-stock event and absence of a separate item allows to find out the strictest requirements to the logistics service level.
A scope of a new order fulfillment planning methodology is provided including order promising, material allocation, production planning and scheduling. An experience of successful implementation of the planning methodology based on advanced planning and scheduling system of the new generation at American special steel maker -TimkenSteel is provided.
The paper analyzes strategic planning of supply chains of contemporary companies. Strategic planning process is viewed in context of its relationship with other planning levels. Typical goals and tasks of strategic supply chain planning are formalized. Key methods of strategic modeling including heuristic, simulation, and mathematical programming are analyzed in terms of their strengths and weaknesses. Author proposes basic classification of models and formalizes structure of a typical supply chain model. Systematic overview of popular mathematical and business software in the research area is provided. It is highlighted that presented in the paper systemized results of analysis of strategic supply chain planning domain were used in developing corresponding methodological principles and strategy for a number of leading international companies.
In this paper is developed and presented an approach to inventory management EOQ-model optimisation taking into account the time value of money and deferrals available for the order cost payments. The research is performed for models with cost-effective supply chains when due to the specified deferral an order payment, storage and other business costs can be paid from revenue. These requirements/limitations require to establish the necessary and sufficient condition for single product and multiproduct models, where the condition provides an opportunity to pay required costs from revenue of the previous reorder interval. The corresponding estimation of the profitability of working capital of such models is given in this article. It can be used when optimising supply chains with the deferred payment of the order, and taking into account the TVM. The EOQ-formula modification for determining optimal parameters of inventory management strategy taking into account the mentioned features is presented in this research. It is also shown that taking the TVM into account for such models refers to the phenomenon of reducing the profitability of working capital.
The management of economic development of the region is associated with the search of conditions and ways to achieve sustainable macroeconomic controlled system. This problem cannot be solved by fragmental solutions based on the analysis of fluctuation trends in the indicators, properties, and case elements. It is necessary to apply methods that will allow to research and to bring in order any region as a complicated macroeconomic system with a lot of interrelated elements and systems. To solve this problem, we applied the simulation modeling method. The novelty of this study is that as an instrument of economic growth at the macro level we consider the supply chain in the context of the formation of an integrated system of supply chains and the balanced development that meets the interests of all participants, economic agents, and targets of socioeconomic development of the region (the achievement of social effect). Particular industry supply chains and levels of integration of supply chains systems have been identified to determine the cost-effectiveness at various levels, based on categories such as price, quality, time, commercialization, and innovation. The simulation method makes it possible to form a holistic view of the system of regional supply chains and to conduct a comprehensive analysis of the balance between performance and efficiency at each level of the supply chain system. An experimental method of management, modeling, and forecasting, allowing to see the problems with the system approach was used in the developed simulation model, implemented on the basis of AnyLogic software.
In the article the logistics management and SCM organizational structures research findings that were conducted by the NRU HSE International Centre of Training in Logistics in 2014-2016 are considered. The sample of companies operating on Russian market accounted about 400 organizations. The form for the respondents of online survey was created. Each participant estimated the logistics management organizational structure (logistic and/or SCM department) individually. The assessment was conducted from the perspective of the correspondence between the organizational structure and corporate and logistics strategies, key business processes, organizational structure management efficiency, functional employees allocation and so on in the different aspects of supply chains and logistics controlling.
The report divided into 6 sections was developed using the results of completed forms, survey in the Internet and interviews with the companies’ leading managers. Sections contain: main information about the company, the organizational structure type of logistics (supply chain) management, the organizational structure place and role in the company’s controlling system and so on.
The examples of typical logistics management structures of line and staff, matrix and project oriented structures are shown. Taking into consideration the importance of the SCM best practices and innovative technologies usage, the questions are highlighted in detail and a great variety of examples in SCM departments organizational planning are given.
The paper proposes an approach to the improvement of the method of successive concessions, which is widely used in solving multicriteria optimization problems in logistics. For the first time, the special formats (hard and flexible) are formalized for the use of this method, making it possible to improve the quality of decision-making procedures by many criteria. These formats are illustrated by the example of the problem of the best choice of a location and the form of ownership of a warehouse. For the first time, the paper discusses the possibility of specifying analytically the ordering of particular criteria, needed for the method of successive concessions, if it is required by the decision-maker. For the first time, practical situations are analyzed, when for some groups of particular criteria such an analytical approach to setting the order of optimization procedures will determine the same importance between them. For such situations, an approach to the analysis of various variants of ordering of particular criteria is presented in order to expand the scope of available applications for the use of the method of successive concessions. For the first time, managers are given the opportunity to rank the given alternatives according to the method of successive concessions. The influence of various variants of ordering particular criteria on the ranking of alternatives is analyzed by such an optimization method.
In the manual knowledge of roughly developing in world new scientific and educational direction - logistics, science about the organization and management of processes and material flow in production is systemically stated. Authors analyze a conceptual framework, development factors, the logistics concept. The main components of logistics in their interrelation - information logistics, logistics of inventory holdings, warehousing logistics, transport, the organization of logistic management and controlling in logistic schemes are in detail considered.
For pupils of higher education institutions, listeners of establishments of postgraduate education, heads and experts.
The study systematizes and formalizes of specialized approaches to managing supply chains of leading metal companies and their relationships. The analysis formalized the main directions of development of the methodology of supply chain planning in terms of adapting to the specific of metals including: the reorganization of relations of existing planning processes in accordance with best practices in the industry planning; consolidation of models CCOR, SCOR and DCOR in a single system of supply chain planning processes; refinement steps of the planning process, and the introduction of additional, if necessary; formalization of methods and planning models; definition of requirements for information technology support.