The subject of research in the paper is to organize the logistics of interactions in a distributed virtual manufacture of high-tech products. The work aims to develop the method to find rational routes in the heterogeneous transport network, considering the time (deadlines), costs, and risks. The article addresses the following tasks: research of logistics interactions across the virtual manufacture of high-tech products (aircraft, automotive, etc.). Logistic interactions are carried out in a heterogeneous transport network that connects individual technological processes of high-tech manufacture. The features of logistics related to the virtualization of manufacture in the form of the new portfolio of orders are analyzed. The suppliers of materials, raw materials, and components that are located in the nodes of the heterogeneous transport network and which are the sources of goods transported in the distributed virtual manufacture are determined. To assess the possible routes of goods transportation in the heterogeneous transport network the values of time (deadlines of goods delivery), as well as freight costs and risks, are considered. The purposeful search for rational routes is carried out using the proposed algorithm for generating and moving numerical "waves" in a heterogeneous transport network. The simulation model to simulate the process of numerical “wave” propagation using planning and implementing of events related to the arrival of goods transported to the nodes of the heterogeneous transport network has been built. The algorithm to simulate the flow of requests in neighboring nodes concerning the node of the considered heterogeneous transport network has been developed. The dead-end nodes and possible parallel paths of equal types of transportation combining neighboring nodes are considered. The built algorithm includes two different phases of simulation: to achieve the “final” node and the inverse phase that is to define the route. The search algorithm is universal and makes it possible to find the routes with minimal time of goods transportation, minimal costs, and risks. The search for a compromise route that satisfies the conflicting criteria of time, cost, and risk has been proposed. The method of rational routes search is designed in the form of the agent simulation model. The following methods are used in the article: system analysis to create the topology of heterogeneous transport network structure; graph theory to represent the flows and routes of goods transportation; simulation to generate and move numerical "waves"; route optimization based on simulation; multi-criteria optimization to find the rational route; agent-oriented simulation to create the routes in the heterogeneous transport network. Conclusions: the proposed method to find the rational routes in a heterogeneous transport network of distributed virtual manufacture allows organizing the logistics transport interactions in distributed virtual production at the initial stages of planning of the new portfolio of orders.
The scientific and applied problem of choosing suppliers of components, materials, and raw materials (CMRM) for the production of high-tech products (aircraft construction, shipbuilding, etc.) with a complex multi-level component architecture of the product is posed and solved. Much attention is paid to the study of long logistic supply chains for CMRM, considering the heterogeneous transport network (aviation transport, rail transport, road transport, etc.) with the transition of goods from one highway to another. The relevance of the topic of the publication is related to the study of the influence of the remoteness of suppliers and the heterogeneity of the transport network on the timing, costs, and risks of delivering CMRM to the production of high-tech products, considering the long supply chains that ensure the interaction between the supplier and the manufacturer. The research solves the problem of a rational choice of suppliers, considering the logistics of CMRM delivery in a heterogeneous transport environment. Due to the complexity of the problem being solved, it is complex and includes the following research stages: selection of suppliers, considering the component architecture of a complex product; formation of a logistics chain for the delivery of CMRM; a study of the effect of cargo transshipment in a heterogeneous transport environment. The solution of the second problem is associated with the choice of optimal logistics chains for the delivery of CMRM from the supplier to the manufacturers. The solution to the third problem is based on modeling the movement of goods, considering transshipment and possible risks. Mathematical methods used system analysis to represent the component architecture of a complex product; integer (boolean) programming to optimize the main logistic indicators; agent-based simulation modeling for the study of logistics chains for the delivery of goods with transshipment and possible risks (climatic, pandemic, terrorist, etc.).
The task of forming the strategic goals of a developing enterprise is set and solved. The existing approaches mainly related to strategic planning without assessing enterprise reform goals feasibility are analyzed. The global goal of a developing enterprise which is decomposed to the sub-goals of the lower levels resulting in a hierarchical structure of goals is analyzed. The global goal tree is composed in a form of nested sub-goals, each of which corresponds to the direction of modernization and further requires long-term and short-term plans to be created to reform the production system. The decomposition of goals is carried out depending on the constraints of the enterprise. To make decisions on the implementation of the strategic goals of the company the already existing solutions based on the experience of domestic and foreign enterprise development are used. Ready-made solutions can only be used if they already have a positive experience in applying them as a set of measures to be taken and appropriate activities on the modernization of the production process, including production logistics. This allows optimizing the financial costs and reduces the timeline for upgrading. The possible solutions are made in the form of elements of a hierarchical precedent base (HPB) that corresponds to the tree of strategic goals of the developing enterprise. For each node of the strategic goals of the enterprise, a set of potential solutions from the practice of past positive experience is formed. If there is no set of network solutions for the reference point of strategic goals this indicates the need to either search for the new solutions or review of the current sub-goal. Each production upgrade solution requires some costs, lead times, and implementation risks and is formulated as a requirement in the HPB. A purposeful search for ready solutions for modernization is carried out using the method of lexicographic subordination of options. In case if there is no known solution for the modernization of the enterprise, the costs and timeline to fulfill the new goal in the context of increased risk are estimated. After the strategic goals tree is built, the feasibility assessment is performed based on the risk values of the individual goals. Convolution of individual risks is carried out from bottom to top, the content of decisions on individual sub-goals is considered. Also, the costs and timelines for modernization are considered to assess the overall feasibility.
The problem of research of business processes related to the organization and management of projects to create the new complex technical products in aerospace, shipbuilding, and other fields of mechanical engineering is stated and solved. The relevance of the study is related to the planning of a set of business processes, taking into account the architectural representation of the complex product being created. The study aims to develop a new method of synthesis of the multilevel complex of business processes to manage the creation of new technology, taking into account the multi-component representation of the complex product architecture. Much attention is paid to the complex product architecture, which is presented as a set of interconnected components. The following component types are outlined: components that can be reused; components that can be adapted to the requirements of the new product; innovative components. The types of components are studied in terms of the building of the set of business processes on their creation, taking into account the main indicators (costs, execution time, risks). Using the positive experience of past developments in the form of ready-to-use business processes helps to minimize the risks, and the new business solutions in their turn ensure the competitiveness of the complex product. The information base of positive past business processes in the form of precedents base is being built. The precedents base is used to find the close analogs of ready-to-use business processes. The set of business processes related to the management of complex product creation is formed. It has a multilevel representation that fully corresponds to the tree-like component architecture of the complex product. The method to synthesize the complexity of business processes that are planned to perform the tasks on the management of projects on creation of complex products for the developing enterprise is constructed. It is based on the “from top to bottom” system design principle. The optimization model to find the minimum costs, time, and risks in the process of business processes creation that takes into account the multilevel structure of the business process is built. The simulation event-based model in the form of a related agent set is used to study the successful execution of planned business processes related to the creation of the complex product. The results of this study should be used in the practice of creating innovative technical products that have a complex multi-level component architecture for the organization and planning of business processes related to development management. Mathematical methods used: systems analysis, precedent theory, lexicographic ordering, component design, integer optimization, simulation modeling.
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