The development of the domestic economy from the beginning of the 21st century is characterized by the growth of energy resources export volumes, including coal. That circumstance determined the increased demand for the design, research and modernization of export bulk cargo terminals. Growth of customers requirements and outdated standards, regulations and specifications define the need to improve design’ quality. An article covers issue of justification of material handling technology in the stockyard area of the export bulk cargo terminal within organizational and technical design. These terminals have a large throughput capacity and a unidirectional material flow which determine their narrow specialization and increased demands of ensuring reliability for terminals’ functioning. Providing of material handling technology in the stockyard area based on using specialized high-performance equipments with stream-flow transportation – stackers and reclaimers, as well as their combined type – stacker-reclaimers. That circumstance defined appropriateness of the problem research of equipment selection type (separate or combined) taking into account special aspects. To solve this problem, we used simulation methods that allowed to create a simulation model of the stockyard area functioning and to carry out experiments of parameters variation. The results allowed to estimate the range of incoming and outgoing flow intensity, which determines preference of choosing schemes with separate or combined equipment’ type. A formalized selection process by using the qualimetry methods based on a system of criteria was offered in reason of accounting special aspects of functioning within justification of the most effective material handling technology with increased accuracy. Mathematical tool, which used in proposed selection procedure, allows to taking into account many parameters, including qualitative characteristics, in spite of difficulty to present them in concrete values form. Thus, accounting special aspects of functioning becomes possible, which in general allows to substantiate the most effective material handling technology.
Russian mining industry experiences a rapid growth providing an attractive market for suppliers of mining equipment. However, it's a customer-dominated market. The customers set stringent requirements for the initial equipment supply, as well as for the after-sale service and spare parts supply. The manufacturers of mining equipment are thus facing the need to rigorously analyze their supply chain, to develop a reasonable customer service policy and to adjust the supply chain to meet the requirements of the service policy. To fulfill the after-sale maintenance requirements, the manufacturers must stock spare parts within the supply chain and to design inventory control policies. This paper presents an agent-based simulation approach for estimation of the supply chain's key performance indicators and to explore the service - cost trade-off. The conceptual model and the description of its implementation in Anylogic 8.4 software are provided. A case-study of a global mining equipment manufacturer's branch operating in Russia is described. The model is used to estimate the inventory control policy parameters required to meet the target customer service level, to compare make-to-order against make-to-stock supply strategies, as well as to explore the service level - cost trade-off.
Author examines the impact of integrated planning and, spesifically, sales and operations planning (S&OP) on balancing and reconciliation of market requirements and operations capabilities. Two levels of planning – operational and tactical – are taken into consideration, and results of balancing attempts on each of them are compared. An outline of new approach to the evaluation of sales and operations planning impact on business economy is presented.
Although on the surface budgeting is seen as the main process, among the factors of its efficiency in the first place is closely associated with the process of formation of the annual operating plan. Especially, the importance of this process increases with the current trends of the transition from mass production to customization. Thus, the reasonable budgeting will be possible only if we pre-carry out detailed planning of operating activities in the physical units. The question is, what level of aggregation we can afford when planning the operations and is it necessary to make their scheduling on the stage of operational (tactical) management? In this article the approach to structuring activities based on modern organizational techniques is formulated, the methodology of formation of the annual operating plan of the company is proposed, are considered the need and opportunities for scheduling execution of orders at the annual time horizon for the enterprise with a high degree of production diversification in the conditions of orders of varying complexity and duration of execution.
The article deals with the problem of quantitative estimates of the most important for process models of the SCOR type. The urgency of the problem is due to the growing competition in the market of logistics services and the increasing consumer requirements for the quality of logistics services. The original algorithm for integrated assessment of the sustainability of the company's business is considered.
Both restricted development of the economic industrial sector and increase in the number of structural investors require effective management of the material and financial resources of an enterprise in order to reduce its production costs. The proposed work considers optimization models for managing the enterprise’s production and financial activities that make it possible to increase the efficiency of its operation in a dynamic market environment. In addition to static models of the optimal production program selection with limited amount of fixed and working capital that do not consider the impact of the time factor, dynamic models of the production program optimization are proposed. Last type of models calculates the effect of inflation on the company’s marginal revenue. Impact of inflation on both the selling and purchasing price is in the focus of the paper. The method to calculate optimal output under lack of inventory and equipment in the static models is based on linear optimization. Meantime, dynamic models are solved by nonlinear optimization. Using the attributes of piecewise constant functions, nonlinear dynamic models with a vector function as a solution is proposed to be transformed into linear programming models. The optimal solutions found in dynamic models are evaluated for its stability to inflation impact. Application of models with dynamic management of fixed and working capital is shown on the numerical example of the OAO Rot Front chocolate factory (a publicly held company under the laws of the Russian Federation) in the second part of the paper.
The problem of management is formalized for the first time by purchases as a problem of a choice of the best decision at many criteria. Thus some of private criteria allow to consider demanded risk factors. Possibilities of the decision of problems of this kind on the basis of a method of a tree of decisions are illustrated.
The article presents a special modification of the EOQ-formula for the task of mini-mizing inventory management costs, for the model with rental storage, taking into acco-unt the specifics of the supply process. Modifications of special EOQ formulas for systems of the specified type were made directly for models important in the format of the cor-responding business. These are systems for which a special concept of effective delive-ries is introduced, when the specified delays for outgoing cash flows make it possible to pay for the order and the corresponding costs of the supply chain from the proceeds at the re-order interval. It will give managers the opportunity to find the optimal inventory management strategy if it is necessary to take into account the combined impact of a num-ber of factors affecting decision-making procedures. We are talking about the need to con-sider the following factors: 1) the time value of money when cash flows of the analyzed supply chain are modeled; 2) the time delay granted to pay for the value of the delivered order; 3) pre-negotiated allowable for the duration of possible delays in the receipt of re-venue from goods sold. The purpose of the article is to draw the attention of managers to existing (and still not used) opportunities to improve the efficiency of inventory mana-gement systems by taking into account these factors for a simulated supply chain and pro-vide the appropriate tool as part of the task. The developed approach to inventory opti-mization while minimizing the costs of the supply chain, significantly will modify the EOQ - formula format to determine the size of the order. The optimal supply volumes taking into account the indicated modification, will become significantly smaller (in comparison with the traditional recommendations of the theory), which will favorably affect the value of working capital, the amount of capital frozen in stocks of goods, and the profitability of the supply chain itself. Formed restrictions on the allowable delay in revenue will de-termine the fulfillment of the conditions for the effectiveness of supply established in this article. In addition, the application of the developed model is presented on the example of a practical situation.
For the task of managing contracts in the supply chain in terms of choosing the optimal contract model, the article for the first time presents the procedures of optimization at many criteria. The paper shows that such a format of the model allows to take into account pure risks that can be formalized as private individual criteria. In this case, they can be taken into account in a special format for presenting estimates of particular criteria. As such a format, the article discusses a method of presenting them corresponding to a generalized selection criteria. For this approach, the article presents optimization procedures for choosing the type of contract based on traditional selection methods. The article illustrates that this approach may lead to different solutions for the alternatives that expands the tools for adapting optimization procedures to the preferences of the decision maker. For the first time the paper proves that according to the format of the selection criterion for the geometric mean (and the same for the multiplication criterion), the transition to the format of generalized data does not change the best choice and ranking of alternatives. The appropriate modeling results are presented within the framework of the pure risk concept.
The author considers basic goals of supply logistics for network retailers in view of coordination and integration of different kinds of logistical activities with marketing and sales divisions to achieve corporate goals with optimal resources costs. It is shown that taking into account the conceptual view and aspects of information support, the majority of logistical problems of supply logistics arise in SRM (Supplier Relationship Management). The next step on the way of improving of optimization of supply management in trading companies has become the application of the process approach for purchasing management. This approach has initiated information systems that allow effectively support planning and controlling of supplying processes. One of such systems entering into the class of local software products of purchasing planning support of trading companies (retail networks in particular) is «Open
to Buy» – ОТВ. The author considers ОТВ’s functionality. The provided case studies of retail networks show how the basic target OTB – the optimization of commodity stocks in supply chain of a network retailer and how major divisions of a retailer cooperate: logistics, sales, marketing, finance while formation of the purchasing plan and inventory management to maximize sales profitability.