Two Concepts of Basic Commodities for Joint Production Systems

Author(s):  
Peter Flaschel
2017 ◽  
Vol 107 (04) ◽  
pp. 231-234
Author(s):  
K. Erlach ◽  
E. Sheehan ◽  
S. Hartleif

In der Stückgutindustrie lassen sich die acht Gestaltungsrichtlinien der Wertstrommethode nach Erlach hervorragend anwenden. In der Prozessindustrie weist die Produktion jedoch häufig andere Merkmale (beispielsweise eine Kuppelproduktion) auf, die neue Herausforderungen an die Wertstrommethode stellen. Aufbauend auf den acht Gestaltungsrichtlinien des Wertstromdesigns werden in diesem Fachbeitrag Handlungsempfehlungen für die Anwendung der Wertstrommethode in der Prozessindustrie diskutiert.   The eight design guidelines of Erlach‘s Value Stream Design Method work well in streamlining operations in the piece-good industry. In the process and chemical industries, however, production systems exhibit different characteristics, like joint production, that present challenges for the eight step value stream design method. Building on the eight design guidelines, this article discusses the deficits of this method in the process industries and gives recommendations for its adaptatio.


2017 ◽  
Vol 37 (3) ◽  
pp. 587-604
Author(s):  
GUSTAVO DAOU LUCAS ◽  
FRANKLIN SERRANO

ABSTRACT This paper explains the “positive profits with negative surplus-value” example of Steedman (1975) and shows that while in joint production systems individual labour values can be negative, the claim that the total labour embodied in the surplus product of the economy (surplus-value) can also be negative is based on assumptions that have no economic meaning (such as negative activity levels).The paper also provides a way to measure the surplus-value of joint production systems which overcomes the problems of the traditional concept and restates the proposition that a positive amount of surplus labour is a necessary condition for positive profits.


2018 ◽  
Vol 52 (2) ◽  
pp. 335-349 ◽  
Author(s):  
Leila Zeinalzadeh Ahranjani ◽  
Reza Kazemi Matin ◽  
Reza Farzipoor Saen

Traditional data envelopment analysis (DEA) models consider a production system as a black-box without taking into consideration its internal linked activities. In recent years, a number of DEA studies have been presented to estimate efficiency score of two-stage network production systems in which all outputs of the first stage (intermediate products) are used as inputs of the second stage to produce final outputs. This paper aims to develop a two-stage network DEA model to study economic notion of economies of scope (ES) between two products. It intends to determine profitability of joint production of two products by one firm. Numerical illustrations are presented to show applicability of proposed methods.


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