Die Wertstrommethode in der Prozessindustrie*/The Value Stream Method in the process industry - Analysis of its shortcomings and recommendations for adaption

2017 ◽  
Vol 107 (04) ◽  
pp. 231-234
Author(s):  
K. Erlach ◽  
E. Sheehan ◽  
S. Hartleif
Keyword(s):  
Production Systems ◽  
Design Method ◽  
Design Guidelines ◽  
Process Industry ◽  
Joint Production ◽  
Industry Analysis ◽  
Process Industries ◽  
Good Industry ◽  
Value Stream ◽  
Different Characteristics

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.

scholarly journals APPLICATION POSSIBILITIES OF DYNAMIC VALUE STREAM MAPPING IN PRODUCTION LOGISTICS

2021 ◽  
Vol 24 (1) ◽  
pp. 55-58
Author(s):  
Peter Tamas ◽  
Keyword(s):  
Production Systems ◽  
Product Family ◽  
Mapping Method ◽  
Value Stream Mapping ◽  
Production Logistics ◽  
Logistics Systems ◽  
Value Stream ◽  
Flexible Production Systems ◽  
Static Version ◽  
Plant Simulation

An increase in the number of product types required by customers results in an increase in the complexity of logistics systems. This finding is particularly characteristic of production logistics systems, where the use of flexible production systems is becoming increasingly important. One of the defining tools for the development of these processes is the value process mapping method, a static version of which suitable for the simultaneous examination of a product family has become widespread in corporate practice. The paper presents the method of dynamic value stream mapping, which is also suitable for the examination of complex logistics systems, exploring its steps and the possibilities of its application in production logistics. An example prepared using the VSM module of the Plant Simulation framework is also presented to illustrate the application of the method.

A New Multidimensional Design Method Based on Meta Model Assistance

2017 ◽  
Vol 7 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Nazih Selmoune ◽  
Zaia Alimazighi
Keyword(s):  
Data Warehouse ◽  
Case Studies ◽  
Design Method ◽  
Essential Element ◽  
Design Guidelines ◽  
Data Warehouses ◽  
Multidimensional Model ◽  
Meta Model ◽  
The Real ◽  
Basic Concepts

Data warehouses have become over the last two decades an essential element in the area of economic intelligence. Although the basic concepts related to this technology are now more standardized (multidimensional model, OLAP technology...), the design method issue remains in discussion, since no proposed method does seem attractive enough to be used rigorously in the real case studies. Indeed, most of the 'Data Warehouse projects' simply follow some design guidelines from the most informal methods. In this paper the authors propose an approach based on the use of the sources metadata to provide help in the multidimensional design. Their approach falls into the category of supply-driven methods, and attempts to cover the various stages of the lifecycle of data warehouses design. The proposed method is associated with a MultiDimensional Design Assistance environment (M2DA) to support the automatic and semi-automatic steps, providing the expected forms of assistance, and managing the interaction with the designer.

Evolution and Adaptation of Forest and Crop Pathogens in the Anthropocene

2020 ◽  
pp. PHYTO-08-20-035
Author(s):  
Pauline Hessenauer ◽  
Nicolas Feau ◽  
Upinder Gill ◽  
Benjamin Schwessinger ◽  
Gurcharn S. Brar ◽  
...  
Keyword(s):  
Population Genomics ◽  
Production Systems ◽  
Management Strategies ◽  
Forest Trees ◽  
Forest Production ◽  
Population Genomic ◽  
Genomic Studies ◽  
Pathogen Populations ◽  
Different Characteristics ◽  
Global Food

Anthropocene marks the era when human activity is making a significant impact on earth, its ecological and biogeographical systems. The domestication and intensification of agricultural and forest production systems have had a large impact on plant and tree health. Some pathogens benefitted from these human activities and have evolved and adapted in response to the expansion of crop and forest systems, resulting in global outbreaks. Global pathogen genomics data including population genomics and high-quality reference assemblies are crucial for understanding the evolution and adaptation of pathogens. Crops and forest trees have remarkably different characteristics, such as reproductive time and the level of domestication. They also have different production systems for disease management with more intensive management in crops than forest trees. By comparing and contrasting results from pathogen population genomic studies done on widely different agricultural and forest production systems, we can improve our understanding of pathogen evolution and adaptation to different selection pressures. We find that in spite of these differences, similar processes such as hybridization, host jumps, selection, specialization, and clonal expansion are shaping the pathogen populations in both crops and forest trees. We propose some solutions to reduce these impacts and lower the probability of global pathogen outbreaks so that we can envision better management strategies to sustain global food production as well as ecosystem services.

Heat Exchanger Design for the Process Industries

2004 ◽  
Vol 126 (6) ◽  
pp. 877-885 ◽  
Author(s):  
Kenneth J. Bell
Keyword(s):  
Design Process ◽  
Large Scale ◽  
Environmental Control ◽  
Design Method ◽  
Physical Processes ◽  
Process Industries ◽  
Rational Representation ◽  
Design Procedures ◽  
Heat Exchanger Design ◽  
Rating Method

The design process for heat exchangers in the process industries and for similar applications in the power and large-scale environmental control industries is described. Because of the variety of substances (frequently multicomponent, of variable and uncertain composition, and changing phase) to be processed under wide ranges of temperatures, pressures, flow rates, chemical compatibility, and fouling propensity, these exchangers are almost always custom-designed and constructed. Many different exchanger configurations are commercially available to meet special conditions, with design procedures of varying degrees of reliability. A general design logic can be applied, with detailed procedures specific to the type of exchanger. The basis of the design process is first a careful and comprehensive specification of the range of conditions to be satisfied, and second, organized use of a fundamentally valid and extrapolatable rating method. The emphasis in choosing a design method is upon rational representation of the physical processes, rather than upon high accuracy. Finally, the resultant design must be vetted in detail by the designer and the process engineer for operability, flexibility, maintainability, and safety.

Method of Predicting Differential Case Bolt Behavior

2015 ◽  
Author(s):  
Takanori Nukata ◽  
Yasuo Arai ◽  
Mitsunori Kamimura ◽  
Taketoshi Kido ◽  
Masahiko Yamazaki
Keyword(s):  
Contact Surface ◽  
Design Method ◽  
Maximum Load ◽  
Design Guidelines ◽  
Ring Gear ◽  
Bearing Surface ◽  
Surface Pressure Distribution ◽  
Screw Surface ◽  
Bolt Loosening ◽  
Seating Surface

This paper proposes a CAE-based method to predict the maximum load at which bolts start to loosen. The qualitative validity of this method was confirmed using the fastening bolts between the differential case and ring gear. In general, the differential case and ring gear are fastened with bolts. Therefore, it is essential to estimate the maximum load of bolt loosening when designing these bolts. Moreover, prototypes found that tightening bolts are more likely to loosen as the thickness of the differential case or ring gear decreases and becomes easier to deform. This indicates that the deformation of the differential case and ring gear must be considered in bolt design. However, predicting the maximum load is relatively difficult because the behavior of both the screw and the contact surface between the differential case and ring gear is complicated. In contrast, recent transmissions require further weight reduction without sacrificing reliability. Consequently, a method of predicting the maximum load of bolt loosening is required. First, this paper describes a CAE model for estimating the pressure and friction generated at the contact surface between the differential case and ring gear, as well as at the screw surface and bolt seating surface. Furthermore, a method for determining bolt loosening is described that incorporates the pressure and friction on the bolt seating surface into friction circle theory. This method was used to derive the maximum load of bolt loosening. In addition, it was also confirmed that the results qualitatively agree with actual cases of bolt loosening. Second, this paper identifies the relative sliding of the screw surface and contact surface when the load increases. In this case, it was verified that the sliding on the contact surface between the differential case and ring gear induces relative sliding of the screw, followed by sliding of the bolt bearing surface and loosening of the bolt. Finally, this paper refers to design guidelines for reducing the weight of the differential case using an experimental design method. Certain ribs cause non-uniform bolt bearing surface pressure distribution, which likely affects bolt loosening. Through this research, the validity of the method was confirmed and the bolt behavior was clarified when a differential case and ring gear are loaded in one direction. Based on these results, it should be possible to apply this method to more complicated load cases in the future.

Material Handling and Assembly Process Optimization using Value Stream Mapping

2017 ◽  
Vol 6 (1) ◽  
pp. 59
Author(s):  
Daniel Derrell Forest ◽  
G.H. Massiha
Keyword(s):  
Process Optimization ◽  
Continuous Improvement ◽  
Lean Manufacturing ◽  
Material Handling ◽  
Design Method ◽  
Added Value ◽  
Value Stream Mapping ◽  
Assembly Process ◽  
Workplace Design ◽  
Value Stream

<span>The purpose of this project is to evaluate and optimize an assembly process for ergonomic and productivity considerations. Companies use lean manufacturing as a method for continuous improvement in order to increase throughput and for to reallocate resources for more important tasks. For this project, value stream mapping (VSM) was used to evaluate, analyze, and improve the ergonomic factors of an assembly process and to increasing throughput. With the use of VSM, researchers are able to see the areas of added value, non-added value, and bottlenecks. This project illustrates the implementation of VSM for the minimization of waste, by using the design method to restructure the process of assembly. The results show drastic improvement in assembly time and ergonomic workplace design, while providing a platform for a continuous improvement system.</span>

scholarly journals Organizational learning and bureaucracy: an alternative view

2020 ◽  
Vol 27 (5) ◽  
pp. 403-415
Author(s):  
Jonas A. Ingvaldsen ◽  
Vetle Engesbak
Keyword(s):  
Organizational Learning ◽  
Knowledge Creation ◽  
Large Scale ◽  
Production Systems ◽  
Alternative View ◽  
Managerial Control ◽  
Process Industries ◽  
Dual Nature ◽  
Content Type ◽  
Periodic Replacement

Purpose This paper aims to reconceptualize the relationship between organizational learning and bureaucracy. Although the two are generally considered to be antithetical, this paper shows that, in some organizations, bureaucracy can be functional for organizational learning. Design/methodology/approach The central argument is theoretical and builds on two main ideas: firstly, the nature of knowledge creation and organizational learning is conditioned by the organization’s main technological characteristics; and secondly, bureaucracy has a dual nature as an instrument of managerial control and as a vehicle of large-scale collaboration. This study uses examples from process industries as empirical illustrations. Findings As products and production systems come to embody deeper and more diverse knowledge, their development takes on an increasingly collaborative character. The need to integrate differentiated knowledge and material artefacts calls for specialization, formalization, centralization and staff roles. Hence, technological complexity drives a bureaucratization of organizational learning. Research limitations/implications The core argument is developed with reference to industries where organizational learning involves the accumulation of knowledge, not its periodic replacement associated with technological shifts. Its relevance outside these industries remains to be assessed. Practical implications Organizations, whose knowledge creation fits the pattern of creative accumulation, should learn to harness formal structures for large-scale collaboration. Originality/value The main thesis runs counter to mainstream perspectives on organizational learning. This paper explores organizational learning in sectors that have received little attention in debates about organizational learning.

Geometrical optimization of bare tube heat exchangers for process industries

2005 ◽  
Vol 219 (2) ◽  
pp. 139-147
Author(s):  
T. Q. Ma ◽  
K. T. Ooi ◽  
T. N. Wong
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
Optimization Design ◽  
Design Method ◽  
Outer Diameter ◽  
Process Industries ◽  
Performance Improvements ◽  
Geometrical Optimization ◽  
Simulation Results ◽  
Bare Tube

This paper presents simulation results on the geometrical optimization design of bare tube heat exchangers. By linking a mathematical model with an optimization alogorithm, it is possible to predict which combination of five geometrical variables would produce a given coil capacity of a heat exchanger, the minimum core volume size operating at the minimum pressure drop. A constrained multivariable direct search technique is used in which the five geometrical variables and a mixture of five explicit and implicit constraints are accommodated. Using this design method, three typical sizes of bare tube optimization cases have been studied. The simulation results predict significant performance improvements for heat exchanger design. The range of tube outer diameter in this optimization study is from 4.9 to 9.0 mm.

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