Repozytorium AGH

Repozytorium instytucjonalne Akademii Górniczo-Hutniczej im. Stanisława Staszica w Krakowie

 

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Ostatnie wpływy

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Rocznik czasopisma
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Rocznik czasopisma
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Artykuł
Otwarty dostęp
Decision Support for Allocating Farmed Fish to Customer Orders Using a Bi-objective Optimization Model
(Wydawnictwa AGH, 2022) Knudseth, Sunniva Haukvik; Molland, Even; Hoff, Arild; Hvattum, Lars Magnus; Oppen, Johan
Aquaculture is an important industry in certain coastal areas. Focusing on the farming of salmon and trout, an operational planning problem arises with the goal of allocating a supply of fish to the demand that is expressed through customer orders. This paper provides a conceptual model of such a planning problem and defines a corresponding bi-objective mathematical programming model. The problem is novel with respect to the structure of fish transport and the rules for satisfying customer orders with respect to fish size, quality, certification, and health status. Computational experiments have been conducted to gain further insight into the use of the provided model to provide support for planners who are involved in operational decision-making. The results indicated that the bi-objective optimization model can be useful in situations where a supply is insufficient to cover all of the demand within a given planning horizon.
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Artykuł
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Risk Management in Heating Industry
(Wydawnictwa AGH, 2022) Iwaszczuk, Aleksander; Iwaszczuk, Natalia
The heating industry plays a very important role in countries with cold and temperate climates, together with the power industry, it determines the energy security of these countries. The aim of this article is to examine the risks that threaten the stability of heating companies. The study is based on an analysis of the scientific literature and the macroeconomic environment as well as on interviews with employees from the heating industry. The article identifies the risks and divides them into three groups: general economic, industry, and specific risks. A risk map was drawn, and a qualitative analysis of their impact was carried out for the aforementioned companies. This map is a useful tool for making decisions that are related to risk management and ensuring the stability of the functioning of business entities as well as gaining information for both government and local authorities in the search for effective ways to drive the sector’s development.
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Artykuł
Otwarty dostęp
Heuristic Algorithm for Lot Sizing and Scheduling on Identical Parallel Machines
(Wydawnictwa AGH, 2022) Książek, Roger
This paper presents a new heuristic algorithm for the task of lot sizing and scheduling for identical parallel machines. The new algorithm is based on the rolling-horizon approach and the fix-and-relax decomposition technique. Two variants of the algorithm are finally proposed for solving the problem of lot scheduling with parallel machines where the number of products and machines is greater than that of the machines. A computational experiment has been conducted for a group of 30 data sets. The results showed that the new algorithm efficiently provided good solutions for tasks with large numbers of machines and products.