A methodology for modelling manufacturing costs at conceptual design

Rehman, Sumaira; Guenov, Marin D.

doi:10.1016/s0360-8352(98)00174-0

Cited by 64 publications

(36 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These needs may be influenced by a range of physical, sensorial, speech-language and cognitive variables such as dexterity, vision, articulation or intellect. Since the literature shows that between 70-90% of a product's lifecycle costs are established once a product design specification is finalised [12,13], it follows that to reduce the costs of AT, it would be useful to look at ways of optimising its design process.…”

Section: Introductionmentioning

confidence: 99%

Crucial design issues for special access technology; a Delphi study

O’Rourke¹,

Ekins²,

Timmins³

et al. 2013

Disability and Rehabilitation: Assistive Technology

View full text Add to dashboard Cite

Purpose. To develop and demonstrate a method to involve professional users of assistive technology (AT) in the development process of customisable products. Employing the ideas of user participation and mass customisation, this research addresses the need for reduced product costs and optimised product flexibility.Method. An adaptable six-question Delphi study was developed to establish consensus among AT professionals on design issues relating to a specified AT domain requiring innovation. The study is demonstrated for the special access technology (SAT) domain. A modified morphological matrix structures the application of the study results to the product design process. 2Results. 14 Professionals from the Republic of Ireland and the UK participated. Consensus was reached on prevalent parts of SAT that malfunction, primary reasons for SAT malfunction, characteristics of clients associated with SAT selection, client needs regarding SAT use and training, desirable traits of SAT, and clinicians" frustrations with SAT.Conclusion. The study revealed a range of problems related to SAT, highlighting the complexities of successful SAT adoption. The questions led to differentiated insights and enabled design solution conceptualisation from various perspectives. The approach was found to help facilitate efficient generation and application of professional users" knowledge during the design process of customisable AT. Implications for RehabilitationHigh product costs and device abandonment negatively affect many people who use assistive technology (AT). Poor device design is a root cause of these two problems.To address this issue, a method for the practical concept generation of customisable AT is proposed and demonstrated. The method aims to support the development of new, low-cost products which satisfy a broad range of consumers' needs.The literature requests suitable methods to facilitate the involvement of different types of AT users in the product design process. This paper presents a method to first establish consensus on important design issues for a specified AT domain, and subsequently to apply these issues to the product design process. This paper describes the method"s application for a customisable special access technology (SAT) device. Crucial design issues for SAT devices are presented to assist future SAT development work in research and industry. 3This research supports and provides validation for a number of past studies about desirable criteria for AT. These studies declared that further research was required to confirm their results.

show abstract

Section: Introductionmentioning

confidence: 99%

Crucial design issues for special access technology; a Delphi study

O’Rourke¹,

Ekins²,

Timmins³

et al. 2013

Disability and Rehabilitation: Assistive Technology

View full text Add to dashboard Cite

show abstract

“…The case-based cost estimation usually depends very closely with the expert judgment together [18]. This approach is useful in reducing the design rework and cost estimation time [22].…”

Section: Cost Estimation In Bidding Phasementioning

confidence: 99%

Cost Estimation in Engineer-to-Order Manufacturing

2016

View full text Add to dashboard Cite

Abstract:In Engineer-to-Order (ETO) manufacturing the price of products must be defined during early stages of product design and during the bidding process, thus an overestimation of product development (PD) costs may lead to the loss of orders and an underestimation causes a profit loss. What many ETO systems have in common is that the products have to be developed based on different customer requirements so that each order usually results in a new variant. Furthermore, many customer requirement change-requests may arise in different phases of the PD, which is to be considered properly. Thus it is utmost important for ETO systems to have an accurate cost estimation in first stages of the product design and to be able to determine the cost of customer requirement changes in different phases of PD. This paper aims to present a cost estimation methodology as well as a cost estimation model, which estimate the cost of products by relative comparison of the attributes of new product variants with the attributes of standard product variants. In addition, as a necessity in ETO manufacturing, the cost calculation of customer requirement changes in different phases of PD is integrated in the presented method.

show abstract

“…Companies' model manufacturing processes for many reasons, including predicting cost (Rehman et al, 1998), predicting resource and material demand and running optimisation studies.…”

Section: Introductionmentioning

confidence: 99%

“…The RFID tags communicate the process information of each product to a database software using RFID tag readers. The information from these RFID tags is used in the work presented here to form a Markov chain representation of the business process routes.Companies' model manufacturing processes for many reasons, including predicting cost (Rehman et al, 1998), predicting resource and material demand and running optimisation studies.When modelling the data produced from the RFID tags the Markov chain produced gives a large variety of process routes. These are not all true reflections of the routes products take.…”

mentioning

confidence: 99%

Modelling manufacturing processes using Markov chains

Leigh

Jackson

Dunnett

et al. 2017

Safety and Reliability – Theory and Applications

View full text Add to dashboard Cite

• This is an Accepted Manuscript of a paper published by CRC Press in INTRODUCTIONModelling manufacturing processes which contain human interactions is difficult and can produce unrealistic views of the process. This is because in many companies the actual manufacturing process that takes place is not as planned when human interaction is involved. Human factors can determine what actually happens, the time it takes and what order it happens in. To produce a more reliable representation of the process more information on what is actually happening is required. This can be found by tracking and recording the process using radiofrequency identification (RFID) tags (Weinstein, 2005). From the data produced from these tags the possible paths which products take in the process can be determined and hence the actual manufacturing process can be defined. Furthermore the data can be used to form Markov chains which can determine what future process routes will look like and the probability of each route. Basing future business simulations on these Markov chains can give a more reliable representation of the business. This reduces the risk of modelling inaccuracies and can help to predict future outcomes and run optimisation more accurately.The research performed here studies a company which refurbishes IT products. The company has a business model of the manufacturing process which it expects the products to follow. The company has tracked their products through the refurbishment process using RFID tags to determine what processes each product undertakes and to allow each object to be kept track of. The RFID tags communicate the process information of each product to a database software using RFID tag readers. The information from these RFID tags is used in the work presented here to form a Markov chain representation of the business process routes.Companies' model manufacturing processes for many reasons, including predicting cost (Rehman et al., 1998), predicting resource and material demand and running optimisation studies.When modelling the data produced from the RFID tags the Markov chain produced gives a large variety of process routes. These are not all true reflections of the routes products take. The data mining process from the RFID tag data is also investigated to allow the development of more precise process models. This process allows thresholds to be set for each route. Hence irregular paths are removed.The Markov chain is necessary to simulate the product flow. The process is simulated using the Markov chain produced from the data and the results can be compared to the process simulated based on previous perceptions of the business process. The results produced will include the time taken for each product to be processed, the cost of the process and the final destination of products. The Markov chain ABSTRACT: Optimizing manufacturing processes with inaccurate models of the process will lead to unreliable results. This can be true when there is a strong human influence on the manufacturing process and man...

show abstract

A methodology for modelling manufacturing costs at conceptual design

Cited by 64 publications

References 2 publications

Crucial design issues for special access technology; a Delphi study

Crucial design issues for special access technology; a Delphi study

Cost Estimation in Engineer-to-Order Manufacturing

Modelling manufacturing processes using Markov chains

Contact Info

Product

Resources

About