Cost estimation system of dies manufacturing based on the complex machining features

Bouaziz, Zoubeir; Younes, Jihene; Zghal, Ali

doi:10.1007/s00170-004-2179-3

Cited by 41 publications

(17 citation statements)

References 13 publications

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“…These approaches often combine the analogical approach and the analytical approach. The solutions proposed in the studies [20][21][22][23] can be included in this group.…”

Section: Cost Estimation Methods-a Reviewmentioning

confidence: 99%

Knowledge-based methods for cost estimation of metal casts

Macioł

2016

Int J Adv Manuf Technol

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The aim of the research presented in this paper was to verify the hypothesis that the problem of estimating the variable costs of metal casts can be solved by using knowledge-based systems. The estimation of variable costs determines the adequate pricing of products, which is a crucial marketing problem in enterprises. The problem of estimating the direct costs is especially important in companies whose participation in the market is defined as versatile manufacturing. This problem was the target of many studies presented in this paper. The assumptions that the direct costs of a metal cast are dependent on the physical features of the cast and the most effective method of cost estimation is an intuitive qualitative technique based on a rule-based system were considered. The nature of the relationships between the casts' features and the direct costs of production could be effectively formed by experts as reasoning rules. In this paper, the results of experiments conducted on the basis of the example of the production program of a foundry that manufactures water-system fittings is presented. Three methods of knowledge-definition and reasoning techniques were examined: the classical method of crisp reasoning, fuzzy reasoning with the Mamdani's method, and fuzzy reasoning with the Takagi-Sugeno model. Proper experiments were conducted. The results of the experiments confirmed the hypothesis, which allows the assessment of different reasoning methods.A. Maciol

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“…These approaches often combine the analogical approach and the analytical approach. The solutions proposed in the studies [20][21][22][23] can be included in this group.…”

Section: Cost Estimation Methods-a Reviewmentioning

confidence: 99%

Knowledge-based methods for cost estimation of metal casts

Macioł

2016

Int J Adv Manuf Technol

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“…In principle, feature-based methods break down the analysed part into standard sections, referred to as features and, based on their geometry, the volume of the material to be removed is determined, which when put together with the properties of the machine used reveals the needed processing time. Further, the cost estimate is an aggregate of the individual processing costs, in a similar manner as with the activity-based approaches (Shehab & Abdalla, 2001;Weustink, et al, 2000;Bouaziz, et al, 2004;Bouaziz, et al, 2006;Chin & Wong, 1995;Wei & Egbelu, 2000;Ben-Arieh, 2000;Ou-Yang & Lin, 1997;Nagahanumaiah, et al, 2005;Jung, 2002).…”

Section: Generative Cost Estimationmentioning

confidence: 99%

An Accuracy Investigation of Product Cost Estimation in Automotive Die Manufacturing

Bendul¹,

Apostu²

2017

IJBA

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Automotive die manufacturers face the constant challenge of producing qualitative products while having to reduce costs. However, cost reduction measures are rather insignificant during the actual manufacturing process as the most important cost-impacting decisions are taken during the design phase. Cost estimation methods attempt to determine the production cost already in the design phase; the cost can be broken down and therefore the plan times of manufacturing processes can be pre-calculated, thus enabling early capacity decisions. Many researchers have been focusing for decades on developing efficient cost estimation methods. Yet their scarce access to cost information meant that most of the developed methods could not be evaluated with real data and thus their implementation in practice being challenged. This paper reviews and classifies cost estimation methods and investigates the accuracy of the estimate based onpractical application in 190 cases. The overall aim is to determine the accuracy level of the studied methods in practice and therefore identify their application fields.

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“…Either an analysis of correlation leads to statistical cost functions [10,11] or detailed bills of material and process plans make an analytic calculation of the future costs possible. Present approaches focus on analytic calculations identifying predefined manufacturing features [12,13]. In this connection, the recognition of features of complex single-part productions is demanding and could not be solved sufficiently for adoption in the quotation costing of pressure moulds.…”

Section: Determination Of a Calculation Modelmentioning

confidence: 99%

Rule-based quotation costing of pressure die casting moulds

Denkena

Lorenzen

Schürmeyer

2008

Prod. Eng. Res. Devel.

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An actual analysis in the tool and mould making sector showed that methods and programs insufficiently support the manufacturers of pressure die casting moulds in the quotation costing process. The primary aim of quotation costing is to generate many first-class bids in order to gain a high quantity of profitable orders. For this purpose companies have to achieve a high calculation precision with low expenditure. In addition, a comprehensible calculation is of great importance in order to enable an internal and external comparability and analysis as well as to permit the customer to assess the performance offered. In order to support companies of the tool and mould making concerning these matters, a working group from industry and science analyzed the quotation costing made by manufacturers of pressure die casting moulds. The article discusses the results of this analysis and describes the development of a rule-based calculation approach.The generation of first-class supplies is of special importance for enterprises of the tool and mould making sector since the fast submission of qualified offers represents the prerequisite for competitiveness [1]. At the same time, the calculation of an estimated price is, as a rule, carried out free of charge. For this reason, the creation expenditure of bids should not increase proportionally with the precision [2]. Apart from the demand for an effort-free creation with simultaneously high calculation quality, the qualitative representation of the performance profile represents another important task in the area of quotation costing. It is decisive for the success of a bid to communicate the competence of the company to the customer. A convincing technical description of the mould with logically presented costs supports an easy internal and external evaluation. It enables the customer to judge whether the offered conditions are superior to those of competitors regarding price and performance [3].Since present concepts and programs do not offer a sufficient solution for manufacturers of pressure die casting moulds, a working group consisting of 10 companies of the tool and mould making was founded in March 2007 at the Institute of Production Engineering and Machine Tools (IFW) of the Leibniz Universität Hannover. The group aims at analyzing the difficulties of quotation costing of pressure die casting moulds and developing a geometrybased quotation costing system. In order to develop this system, a method has to be found that renders possible to use the geometry information of the casting part for an accurate calculation.The following chapter shows the results of an analysis conducted by the working group regarding the quotation costing process of pressure die casting mould manufacturers. Furthermore, these results provide a basis to summarize the challenges of the quotation costing process of pressure mould producing companies.

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Cost estimation system of dies manufacturing based on the complex machining features

Cited by 41 publications

References 13 publications

Knowledge-based methods for cost estimation of metal casts

Knowledge-based methods for cost estimation of metal casts

An Accuracy Investigation of Product Cost Estimation in Automotive Die Manufacturing

Rule-based quotation costing of pressure die casting moulds

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