József Vörös

József Vörös
University of Pécs | PTE · Institute of Business and Management Studies

About

21
Publications
1,418
Reads
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300
Citations
Citations since 2016
3 Research Items
104 Citations
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201620172018201920202021202205101520

Publications

Publications (21)
Article
Full-text available
Összefoglaló. Jelen tanulmányban a termelési folyamatokat, valamint statisztikai adatokat elemezve azt vizsgáljuk, hogy a pandémia során milyen hatások érték az inputokat, magát a termelést, az outputokat, illetve hogyan változtak meg olyan versenyprioritási tényezők, mint az idő, a minőség vagy a rugalmasság. Mivel a rövidebb, a kevésbé komplex és...
Chapter
Even after many years one kind picture still floating in my eyes: I see professor Szidarovszky, facing the blackboard, sponge and chalk at the upheld left and right hands, and writing and cleaning the lines simultaneously he put on the table, to fill up our heads with numerical methods. This style expresses his very dynamic and efficient research w...
Article
Lots exist even in a JIT environment. However, there is a continuous effort to decrease set up time, and employees are empowered to signal quality problems. When signaled quality problems are not fixed inside the cycle time the assembly line stops and is resumed again after the correction. But good JIT systems are pragmatic, and sometimes products...
Article
In many cases the quality of each item in a lot is checked. Speeding up the quality checking process increases the responsiveness of the system and saves cost. The percentage of defective items is a random variable and two models are proposed. In one of the models the system remains always at the same state, while in the other one after each order...
Article
The paper deals with a version of the economic order and production quantity models when the fraction of defective items is probability variable that either may vary from cycle to cycle, or remains the same as it was in the first period. We drop the well-known assumption intended to avoid shortages, and two lot sizing rules are derived. Relationshi...
Article
Managing knowledge based resource capabilities has become very important in recent years and during a finite horizon it seems to be reasonable to develop the capabilities intensively at the beginning as one can utilize those over a longer period of time. With the help of multi-period models we check the validity of this idea and characterize the dy...
Article
Although quality has received significant attention during the last decades and its economic benefits are beyond any doubt, lots of questions have remained unanswered as to how much, when, and in what to invest to maintain sustainable competitive advantage. A model is introduced here to guide a firm in addressing these questions. The firm produces...
Article
This paper analyzes an organization that has a well-defined strategy providing a sustainable competitive advantage. This advantage is expressed by at least one dimension of quality on which the product or service exhibits outstanding performance. Using decreasing and increasing exponential demand functions for price and quality, respectively, the o...
Article
In this paper we develop a model that considers process quality improvement and setup cost reduction. The distinctive characteristics of our model are embodied in the assumptions that production rate is finite and cost of attaining close to zero setup time is not infinite. Additionally, the process layout makes possible spotting problems at the pla...
Article
Hogyan válhat egy veszteséges cég rövid idő alatt nyereségessé? A szerzők a régi gazdasági rendszerben gyökerező FÉG Konvektorgyártó Rt. gazdasági nehézségeit, a gondjaik leküzdésére bevetett technikákat, stratégiaváltásokat dolgozzák fel esettanulmányukban.
Article
In this paper the standard portfolio case with short sales restrictions is analyzed.Dybvig pointed out that if there is a kink at a risky portfolio on the efficient frontier, then the securities in this portfolio have equal expected return and the converse of this statement is false.For the existence of kinks at the efficient frontier the sufficien...
Article
In this paper the efficient portfolio frontier is derived explicitly for cases in which short sales are not allowed and more than one variable vanishes in a point of investment returns (degenerate case). When the covariance-variance matrix of the problem is singular (positive semi-definite) or diagonal some properties are also derived.
Article
In this paper the efficient portfolio frontier is derived explicitly for cases in which short sales are not allowed. When all securities are risky it is shown that the efficient portfolio frontier consist of a series of monotonously increasing arcs of convex parabolas in the return-variance plane. If the efficient portfolio frontier of risky securi...
Article
Full-text available
A year ago, when the first signs of the global financial crisis could be noticed, even prime ministers did not believe that the tides of the crisis would reach CEE countries. Now that some countries of CEE found shelter under IFM to avoid financial collapse, CEE countries have received larger attention how they can cope with the problems. This pape...
Article
A kutatás keretében három A és egy B nemzetközi kategóriás (a Bécsi Egyetem lapklasszifációja szerint), továbbá hazai A kategóriás hazai publikációk jelentek meg. Bessenyei István megvédte PhD értekezését. A témavezető elnöke volt a Pécsett megrendezett 17th EURO Mini Conferenc-nek (2005, június 29-július 1), továbbá meghivott track chair-je volt a...

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