scholarly journals Decomposition-Based Assembly Synthesis of Multiple Structures for Minimum Production Cost

2003 ◽  
Author(s):  
Onur L. Cetin ◽  
Kazuhiro Saitou
Keyword(s):  
Production Cost ◽  
Economies Of Scale ◽  
Structural Strength ◽  
Production Costs ◽  
Manufacturing Cost ◽  
Manufacturing Costs ◽  
Multiobjective Genetic Algorithm ◽  
Trade Offs ◽  
Multiple Structures

An extension of decomposition-based assembly synthesis for structural modularity is presented where the early identification of shareable components within multiple structures is posed as an outcome of the minimization of estimated production costs. The manufacturing costs of components are estimated under given production volumes considering the economies of scale. Multiple structures are simultaneously decomposed and the types of welded joints at component interfaces are selected from a given library, in order to minimize the overall production cost and the reduction of structural strength due to the introduction of joints. A multiobjective genetic algorithm is utilized to allow effective examination of trade-offs between manufacturing cost and structural strength. A new joint-oriented representation of structures combined with a “direct” crossover is introduced to enhance the efficiency of the search. A case study with two aluminum space frame automotive bodies is presented to demonstrate that not all types of component sharing are economically justifiable under a certain production scenario.

Decomposition-Based Assembly Synthesis of Multiple Structures for Minimum Manufacturing Cost

2004 ◽  
Vol 127 (4) ◽  
pp. 572-579 ◽  
Author(s):  
Onur L. Cetin ◽  
Kazuhiro Saitou
Keyword(s):  
Genetic Algorithm ◽  
Early Identification ◽  
Economies Of Scale ◽  
Structural Strength ◽  
Manufacturing Cost ◽  
Manufacturing Costs ◽  
Multiobjective Genetic Algorithm ◽  
Trade Offs ◽  
Multiple Structures

An extension of decomposition-based assembly synthesis for structural modularity is presented where the early identification of shareable components within multiple structures is posed as an outcome of the minimization of estimated manufacturing costs. The manufacturing costs of components are estimated under given production volumes considering the economies of scale. Multiple structures are simultaneously decomposed, and the types of welded joints at component interfaces are selected from a given library, in order to minimize the overall manufacturing cost and the reduction of structural strength due to the introduction of joints. A multiobjective genetic algorithm is used to allow effective examination of trade-offs between manufacturing cost and structural strength. A new joint-oriented representation of structures combined with a “direct” crossover is introduced to enhance the efficiency of the search. A preliminary case study with two simplified aluminum space frame automotive bodies is presented to demonstrate that not all types of component sharing are economically justifiable under a certain production scenario.

scholarly journals Which future path to pick? A contingency approach to omnichannel warehouse configuration

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Joakim Hans Kembro ◽  
Andreas Norrman
Keyword(s):  
Economies Of Scale ◽  
Task Complexity ◽  
Contextual Factors ◽  
Future Research ◽  
Research Issues ◽  
Content Type ◽  
Secondary Sources ◽  
Trade Offs ◽  
Contingency Approach

PurposeRecent studies have highlighted the importance of adopting a contingency approach to configuring omnichannel warehouses. Nonetheless, research on how various contextual factors influence the selection of warehouse configuration is scarce. This study fills this knowledge gap by exploring how and why certain configurations fit in different omnichannel contexts.Design/methodology/approachA case study is conducted with six leading Swedish omnichannel retailers. Focusing on outbound warehouse configurations, data are collected through interviews, on-site observations, and secondary sources. A multistep analysis is made, including both pattern matching and explanation building.FindingsThe qualitative analysis reveals 16 contextual factors, of which assortment range, requested online order fulfillment times, goods size and total transactions are the most influential. The study shows how contextual factors create different challenges, thereby influencing the choice of the configurations. In addition to market dynamics and task complexity, the study describes four categories of the factors and related challenges that are particularly important in omnichannels: speed, space, economies of scale and tied-up capital.Research limitations/implicationsThe findings highlight the importance of understanding context and imply that multiple challenges may require trade-offs when selecting configurations, for example, regarding what storage, processes and resources to integrate or separate. To confirm, extend, challenge and further operationalize the ideas and observations put forward in this paper, an agenda with future research issues is given for this accelerating, contemporary phenomenon.Practical implicationsManagers could leverage the frameworks proposed for the contextual profiling of their current and future positions. The frameworks provide support for understanding the important challenges and potential trade-offs and developing aligned configurations.Originality/valueThis study is original in the way it provides in-depth, case study findings about contextual factors and their influence on omnichannel warehouse configuration.

Design for Injection Molding: Balancing Mechanical Requirements, Manufacturing Costs, and Material Selection

1995 ◽  
Author(s):  
Kurt A. Beiter ◽  
James M. Cardinal ◽  
Kos Ishii
Keyword(s):  
Cycle Time ◽  
Material Selection ◽  
Performance Measure ◽  
Production Costs ◽  
Manufacturing Cost ◽  
Manufacturing Costs ◽  
Time Estimates ◽  
Current Implementation ◽  
Molded Parts ◽  
Design Selection

Abstract This paper describes a procedure for considering mechanical requirements, manufacturing costs, and material selection in the design of injection molded parts. The benefit of this approach is the simultaneous consideration of the implications of material selection and part geometry on estimated manufacturing cost during candidate design selection. The current implementation uses the allowable deflection of a flat plate as an example performance measure. Manufacturability concerns include required part thickness and gating scheme to adequately mold the part, and a resulting cycle time based on part cooling time estimates. Part manufacturing cost includes material cost, cycle time, and production costs. A PC-based and CAD-integrated program illustrate our proposed procedure.

scholarly journals The Price Determination Method Through Production Costs Calculation Study on Tas Tajur PT SKI, Bogor

2019 ◽  
Vol 5 (2) ◽  
pp. 1423-1432
Author(s):  
Iriyadi .
Keyword(s):  
Production Cost ◽  
Secondary Data ◽  
Production Costs ◽  
Cost Calculation ◽  
Manufacturing Cost ◽  
Selling Price ◽  
Price Determination ◽  
The Difference ◽  
The Cost ◽  
Descriptive Method

The purpose of this research is to analyze the method used in calculating production cost and selling price of bag type 3673 on Tas Tajur PT SKI Bogor and also to compare the method used with full costing and variable costing method. This study used descriptive method and used primary and secondary data. The finding of research can be concluded that calculation of bag production cost type 3673 using company method, full costing, and variable costing each equal to Rp66.700, Rp69.830, and Rp68.700. While for the selling price of type 3673 bag using company method, full costing, and variable costing of Rp199,900, Rp209,490 and Rp206,100 respectively. The difference in bag manufacturing cost calculation lies in the factory overhead cost consisting of the cost of depreciation of the factory sewing machine, the cost of factory table depreciation, the cost of factory maintenance and the cost of factory utility.

Highly Flexible Final Production Stages: A New Approach for Assembly in the Variant-Rich Series Production

Manufacturing ◽  
2003 ◽  
Author(s):  
Hans-Peter Wiendahl ◽  
Volker Grosse-Heitmeyer
Keyword(s):  
Economies Of Scale ◽  
Production Costs ◽  
Global Competition ◽  
Practical Case ◽  
New Approach ◽  
Production Stage ◽  
Late Emergence ◽  
Production Stages ◽  
Rapid Manufacture

The rapid manufacture of a great range of variant products is gaining importance in global competition. Customers are increasingly demanding products which are matched to their specific requirements. The production of these customized variants gives a competitive advantage, but also leads to higher production costs. Almost every step in the process of making a product is capable of generating variants. A key element in variant management is to make the variants as late as possible in order to exploit economies of scale in the earliest stages of production and to minimize the complexity of production [9], [6]. The technique of the highly flexible final production stage consists in achieving a late emergence of variants by integrating the variant-specific manufacturing processes into the assembly stage. This means abandoning the conventional distinction between manufacture and assembly in favour of a division into a preliminary, variant-neutral production stage and a final production stage where the variants take shape. The final production stage includes all the processes that yield variants. The complete manufacture of variant-neutral parts and subassemblies takes place in the preliminary production stage, as does the prefabrication of those parts and sub-assemblies which are to undergo final manufacture as variants in the final production stage. The result is a procedure capable of producing a broad spectrum of variants economically and with minimal throughput times. This paper describes the philosophy of this new approach and concludes with a practical case study.

Development of a Production Cost Estimation Framework for Product Family Design

2004 ◽  
Author(s):  
Jaeil Park ◽  
Timothy W. Simpson
Keyword(s):  
Cost Estimation ◽  
Production Cost ◽  
Economies Of Scale ◽  
Product Family ◽  
Production Costs ◽  
Main Task ◽  
Primary Concern ◽  
Product Family Design ◽  
Design Variables ◽  
The Family

The main task of a product family designer is to decide the right components/design variables to share among products to maintain economies of scale with minimum sacrifice in the performance of each product in the family. The decisions are usually based on several criteria, but production cost is of primary concern. Estimating the production cost of a family of products involves estimating the production cost of each product in the family including the cost effects of common and variant components/design variables in the family. In this paper, we introduce a production cost estimation framework for product family design based on Activity-Based Costing (ABC), which is composed of three stages: (1) allocation, (2) estimation, and (3) analysis. In the allocation stage, the production activities that are necessary to produce all of the products in the family are identified and modeled with an activity table, a resource table, and an activity flow. To allocate the activities to products, a product family structure is represented by a hierarchical classification of the items that form the product family. In the estimation stage, production costs are estimated by converting the production activities to costs using key cost drivers that consume main resources. In the analysis stage, components/design variables for product family design are investigated with resource sharing methods through activity analysis. As an example, the proposed framework is applied to estimate the production cost of a family of cordless power screwdrivers.

scholarly journals Financial Feasibility Study of Hydroponic Vegetables Business (A Case Study on Serua Farm, Kota Depok)

2021 ◽  
Vol 58 (1) ◽  
pp. 105-112
Author(s):  
Farida Nursahib, Et al.
Keyword(s):  
Production Cost ◽  
Production Costs ◽  
Limited Area ◽  
Business Owner ◽  
Total Production ◽  
Financial Feasibility ◽  
Business Efficiency ◽  
Cultivation Technology ◽  
Break Even Point

Hydroponic, an agricultural cultivation technology, enabling farmers to plant more plants in a limited area. Therefore, it can be used to increase production, then gaining more profit. This study aimed to analyse production costs, incomes, break-even point , business efficiency, and financial feasibility of a hydroponic vegetable business. The method used in this study is direct interviews with the business owner, the head of the garden, the person in charge of the greenhouse and production and the person in charge of seeding. Serua Farm produces red spinach, green spinach, gai lan, and bok choy. The results show that the total production cost was Rp319,420,734 per hectare. Its profit was Rp. 688,579,266 or 68,31% from gross incomes. R/C  was 3.16 meant that the business efficiency was good. B/C  was 2.16 meant that the business is profitable and financially feasible. NPV was Rp552,162,558 and IRR 107,5%. PP value is five months six days.

Decomposition-Based Assembly Synthesis for Structural Modularity

2004 ◽  
Vol 126 (2) ◽  
pp. 234-243 ◽  
Author(s):  
O. L. Cetin ◽  
K. Saitou
Keyword(s):  
Modular Design ◽  
Structural Strength ◽  
Local Geometry ◽  
Multi Objective Optimization ◽  
Weld Joints ◽  
Trade Offs ◽  
Optimization Formulation ◽  
Definition Of ◽  
Manufacturability Evaluation

A method for modular design of structural products such as automotive bodies is presented where two structural products are simultaneously decomposed to components considering the structural performances of each structure and the component sharing between two structures. The problem is posed as an optimization to minimize the reduction of structural strength due to the introduction of spot-weld joints and the number of redundant joints, while maximizing the manufacturability of the component and component sharing between two structures. As an extension to our previous work, this paper focuses on the simultaneous decomposition of two 3D beam-based structures. The major extensions include 1) a new, realistic definition of feasible joining angles based on the local geometry of joining components, 2) a component manufacturability evaluation that eliminates the need of specifying the number of components prior to decomposition and 3) a multi-objective optimization formulation that allows an effective exploration of trade-offs among different criteria. A case study on the simplified, 3D beam models of automotive bodies is presented to demonstrate the developed method.

Immaterial Cost and Production: Maximum Production Cost Level Through Marginal Approach

2020 ◽  
Vol 8 (2) ◽  
pp. 128-149
Author(s):  
Dini Maulana Lestari
Keyword(s):  
Quantitative Study ◽  
Marginal Cost ◽  
Production Cost ◽  
Maximum Level ◽  
Production Costs ◽  
Total Production ◽  
Sugar Factory ◽  
Maximum Production ◽  
Cost Approach ◽  
South Sulawesi

This paper will discuss about the immaterial costs and production yields at one of the refined sugar factory companies in Makassar, South Sulawesi. The theory is based on the fact that Immaterial is a cost that is almsgiving, meaning costs that are outside of the basic costs of the company in producing production, so this research aims to find out: (1) what is the production cost needed to produce this production, (2) the maximum level of production at company from 2013 to 2017. This type of research is a quantitative study because it uses a questionnaire in the form of values ​​that are processed using the marginal cost approach formula. The results of the analysis show that (1) the maximum level of production costs occurred in 2016 amounting to 6,912 with an Immaterial cost of Rp. 2,481,796,800 and the total production produced is 359,077.3 tons (2) The required workforce with the total production produced is 359,077.3 tones of 180 people including the maximum production point which means that the lowest value is achieved (optimal).    

PROFITABILITAS USAHA PETERNAKAN AYAM BROILER DENGAN TIPE KANDANG YANG BERBEDA

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Nurul Mukminah ◽  
Rita Purwasih
Keyword(s):  
Economic Analysis ◽  
Production Cost ◽  
Broiler Chicken ◽  
Production Costs ◽  
Different Types

This study aims to determine and compare the profitability of different types of broiler chicken farms (open and cloused houses) in Subang Regency. This study involved 9 farmers consisting of 5 farmers with closed house and 4 farmers with open house who partnered with PT. Surya Unggas Mandiri (PT. SUM). Production costs taken are 2 production periods from May-August 2018. Data are analyzed using economic analysis and descriptive methods. The results showed that the production cost per period per 1000 birds closed house was higher (Rp. 27.656.768,-) compared to open house (Rp. 24.975.671,-). The revenue per period per 1000 birds of closed house is higher (Rp. 30.606.931,-) compared to open house (Rp. 25.788.618,-). The profit of farmers who use closed house is higher (Rp. 2.621/period/bird) than open house (Rp.417,-). The profitability in close house s is 9.48% and is very feasible to develop

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