Browsing by Subject "supply chain"

Now showing 1 - 11 of 11

Access status: Open Access ,
Aggregate planning in manufacturing company - linear programming approach
(AGH University of Science and Technology Press, 2011) Hanczar, Paweł Stanisław; Jakubiak, Michał
The authors take into consideration the process of translating demand forecasts (or sale plans) into production plan. In the first part of the paper the characteristics and parameters of a aggregate planning are summarized. The main part contains the proposal of integer programming model which supports aggregate planning decisions. In the proposed model production quantities, timing of inputs, inventory levels and workloads are considered. The last part of the paper contains the presentation of computational result obtained by using the introduced model.
Access status: Open Access ,
Company strategy in the crisis period
(AGH University of Science and Technology Press, 2010) Malindžák, Dušan; Mervart, Jaroslav
The article deals with the logistic strategies enabling an enterprise to create a strategy flexible in terms of business and marketing and stable in terms of manufacturing. In order to create a strategy model the following principles can be applied: shorter periods of capacity planning combined with flexible planning, SYNCRO - MRP principle, the application of forecasting in operative planning, creation with partners one of the cooperation form as supply chain, demand chain, lean supply chain, agile supply chain, leagile supply chain, and using the DBR, APS and SCP systems.
Access status: Open Access ,
Controlling of logistics projects
(AGH University of Science and Technology Press, 2011) Pisz, Iwona
A logistics project can be defined as a complex, special and unique sets of activities which can be described by technical and economic parameters and is determined by cost, time, and scope in order to aid logistics management in enterprise/supply chain. Controlling of the logistics project is process of measuring progress toward an objective, evaluating what remains to be done, and taking the necessary corrective tasks to achieve or exceed the objectives of the logistics project. This paper describes the idea of logistics projects. The controlling of logistics projects is discussed. In the paper tools dedecated for controlling of logistics projects are presented. The tools can be applied to the controlling process to support the management of logistics projects.
Access status: Open Access ,
Integrated scheduling in a supply chain by mixed integer programming
(AGH University of Science and Technology Press, 2008) Sawik, Tadeusz
A mixed integer programming approach is proposed for a long-term, integrated scheduling of material manufacturing, material supply and product assembly in a customer driven supply chain. The supply chain consists of three distinct stages: manufacturer/ supplier of product-specific materials (parts), producer where finished products are assembled according to customer orders and a set of customers which generates final demand for the products. The overall problem is how to coordinate manufacturing and supply of parts and assembly of products so that the total supply chain inventory holding cost and the production line start-up and parts shipping costs are minimised. Numerical examples are presented and some computational results are reported.
Access status: Open Access ,
Metoda selekcji dostawców i środków transportu dla sieci dostaw
(Wydawnictwa AGH, 2011) Magiera, Marek
Do ogniw sieci dostaw, dla której zbudowano wielopoziomową metodę, należą m. in. producenci: części składowych, złożonych wyrobów. Na pierwszym poziomie metody ma miejsce wybór dostawców - producentów części składowych. Drugi poziom metody poświęcono wyborze firm transportowych i przynależnych im środków transportu. Dla każdego z poziomów metody zbudowano liniowe modele zadań programowania całkowitoliczbowego, w których uwzględniono kryteria kosztowe. Zamieszczono wyniki eksperymentów obliczeniowych.
Access status: Open Access ,
Modułowy system wspomagania zarządzaniem łańcuchem dostaw
(Wydawnictwa AGH, 2009) Magiera, Marek
The paper presents the three-level method of supporting supply chain management. The initial schedule for each manufacturer is created at the first level. The second level is used for scheduling of transport products between manufactures. The final schedule for each manufacturer is created at the third level. The linear mathematical models of mixed integer programming are used in the method. The global optimization (minimization of costs) and local optimization (for each manufacture) are simultaneously regarded in the described method.
Access status: Open Access ,
Partial coordination may increase overall costs in supply chains
(2008) Kaczmarczyk, Waldemar
This paper presents a computational study to evaluate the impact of coordinating production and distribution planning in a two-level industrial supply chain. Three planning methods are compared. The first emulates the traditional way of planning. The two other coordinate plans of the supplier and of all the buyers according to the Vendor Managed Inventory (VMI) approach. The monolithic method solves a single model describing the entire optimization problem. The sequential method copies the imperfect VMI practice. All three methods are implemented by means of Mixed Integer Programming models. The results presented prove that the right choice of planning method is very important for overall cost of the supply chain. In contrast to the previous research, it turned out that information sharing without full coordination may even lead to increase in the overall cost. For some companies applying the VMI approach, developing exact models and solving them almost optimally may therefore be very important.
Access status: Open Access ,
Petri nets of the materials flow at the steel plant
(Wydawnictwa AGH, 2007) Łebkowski, Piotr
A Petri deterministic time net applied to the modelling of the material flow at the steel plant is a very effective research tool. This paper presents a Petri net expanded with the attribute vectors of places and transitions, as well as the logical rules of transition launching and the procedures that update the attribute values. Owing to such an expansion, we can observe the properties of the streams that flow through the system, e.g. the costs and the project completion time, simulate the effects of the changes introduced into the system and analyse the results of unexpected disturbances and the breaks in the supply chain.
Access status: Open Access ,
The comparison between "ETO" and "non-ETO" capabilities of supply chains in terms of the characteristics of manufacturing activities
(AGH University of Science and Technology Press, 2009) Świerczek, Artur
From the perspective of a product development, employing ETO (engineer-to-order) and non-ETO (non engineer-to-order) concepts in the supply chains is contingent upon a number of factors reflecting the major characteristics of manufacturing practices. However, it may be assumed that there is a diverse intensity of the factors reflecting manufacturing features which enable to achieve and sustain the ETO and non-ETO capabilities of supply chains. The aim of the paper is to confront engineer-to-order and non engineer-to-order orientations of the supply chains in terms of their major appropriate characteristics of a manufacturing process. Having employed a research methodology and performed necessary statistical analyses, the conclusions were derived. They suggested to which extent the identified factors reflecting the properties of a manufacturing process may be referred to both ETO and non-ETO capabilities of the supply chains and how those factors distinguish between them.
Access status: Open Access ,
The success factors for supply chains of a short life cycle product
(AGH University of Science and Technology Press, 2008) Szozda, Natalia; Świerczek, Artur
The supply chain is one of the most common concepts, broadly described and examined in logistics literature. However, hardly ever in the literature has attention been paid to relating specific methods and techniques used in supply chain, which would facilitate effective organisation management with the external conditions and operating environment. The paper presents the influence of a short life cycle product on supply chains in a context of the uncertainty and variability of customers' demand. In a later part of the paper, specific practical solutions for an effective supply chain of a short life cycle product are presented. The considerations are supported by the analysis of the selected illustrative case studies presenting practical initiatives taken by companies.
Access status: Restricted ,
Zastosowanie podejścia Lean dla optymalizacji logistycznego systemu przedsiębiorstwa
(Data obrony: 2018-03-08) Ploshchanskyi, Ihor
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