Grouping Product Variants based on Alternate Machines for Each Operation

Navaei, Javad; ElMaraghy, Hoda A.

doi:10.1016/j.procir.2014.01.124

Cited by 10 publications

(6 citation statements)

References 12 publications

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“…Grouping of products by their manufacturing operations has been investigated by numerous authors. The methods base the grouping on a variety of criteria and apply an algorithm that groups the products (Navaei and ElMaraghy, 2014). Similarly, the grouping of maintenance operations is a broad subject and it has been developed and implemented in a variety of engineering systems.…”

Section: Grouping Methodsmentioning

confidence: 99%

“…Grouping methods have been suggested in both manufacturing and maintenance literature. These methods are most commonly focused on algorithms that analyse the maintenance and suggest optimized solutions (Assaf and Shanthikumar, 1987;Cui and Li, 2006;Dekker and Smeitink, 1991;Hu and Zhang, 2014;Li et al, 2018;Navaei and ElMaraghy, 2014;Nzukam et al, 2017;Poppe et al, 2018; Van et al, 2013;Vu et al, 2018Vu et al, , 2014Wu et al, 2020;Zhang et al, 2017). However, the articles have not focused on creating methods and frameworks for more complex decisions that require human expert evaluation.…”

Section: Introductionmentioning

confidence: 99%

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Standardising Maintenance Jobs to Improve Grouping Decision Making

et al. 2021

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Maintenance decision making is an important part of managing the costs, effectiveness and risk of maintenance. One way to improve maintenance efficiency without affecting the risk picture is to group maintenance jobs. Literature includes many examples of algorithms for the grouping of maintenance activities. However, the data is not always available, and with increasing plant complexity comes increasingly complex decision requirements, making it difficult to leave the decision making up to algorithms.This paper suggests a framework for the standardisation of maintenance data as an aid for maintenance experts to make decisions on maintenance grouping. The standardisation improves the basis for decisions, giving an overview of true variance within the available data. The goal of the framework is to make it simpler to apply tacit knowledge and make right decisions.Applying the framework in a case study showed that groups can be identified and reconfigured and potential savings easily estimated when maintenance jobs are standardised. The case study enabled an estimated 7%-9% saved on the number of hours spent on the investigated jobs.

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Section: Grouping Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Standardising Maintenance Jobs to Improve Grouping Decision Making

et al. 2021

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“…There are various clustering algorithms in use today, with the most popular being the average linkage clustering (Navaei and ElMaraghy, 2014; Gupta et al , 2014; Galan et al , 2007) It displays key attributes of the parts in a single matrix, hence grouping those with higher similarities. The process is repeated until all parts are grouped into families and thus create a dendrogram.…”

Section: Developing a Guideline For The Design Of Part Families For An Rgsandbpmmentioning

confidence: 99%

Development of part families for a reconfigurable machine

Sibanda

Mpofu

Trimble

et al. 2019

JEDT

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Purpose Reconfigurable machines tools (RMTs) are gaining momentum as the new solutions to customised products in the manufacturing world. The driving force, among others, behind these machines is the part envelope and the part family of products that they can produce. The purpose of this paper is to propose a new class of RMT known as a reconfigurable guillotine shear and bending press machine (RGS&BPM). A part family of products that this machine can produce is developed using hierarchical clustering methodologies. The development of these part families is guided by the relationship of the parts in the family in terms of complexity and geometry. Design/methodology/approach Part families cannot be developed in isolation, but that process has to incorporate the machine modules used in the reconfiguration process for producing the parts. Literature was reviewed, and group technology principles explored, to develop a concept that can be used to develop the part families. Matrices were manipulated to generate part families, and this resulted in the development of a dendrogram of six possible part families. A software with a graphic user interface for manipulation was also developed to help generate part families and machine modules. The developed concept will assist in the development of a machine by first developing the part family of products and machine modules required in the variable production process. Findings The developed concepts assist in the development of a machine by first developing the part family of products and machine modules required in the variable production process. The development of part families for the RGS&BPM is key to developing the machine work envelope and modules to carry out the work. This work has been presented to demonstrate the importance of machine development in conjunction with a part family of products that the machine will produce. The paper develops an approach to manufacturing where part families of products are developed prior to developing the machine. The families of products are then used to develop modules that enable the manufacture of the parts and subsequently the size of the machine. Research limitations/implications The research was limited to the development of part families for a new RGS&BPM, which is still under development. Practical implications The study reflects the development of reconfigurable machines as a solution to manufacturing challenges in terms of group technology approaches adopted in the design phase. It also highlights the significance of the concepts in the reconfigurable machine tool design. The part families define the machine work envelop and its reconfiguration capability. Social implications The success of the research will usher an alternative to smaller players in sheet metal work. It will contribute to the easy development of the machine that will bridge the high cost of machine tools. Originality/value The study contributes to the new approach in sheet metal manufacturing where dedicated machines may be substituted by a highly flexible reconfigurable machine that has a dual operation, making the investment for small to medium enterprises affordable. It also contributes to the body of knowledge in reconfigurable machine development and the framework for such activities, especially in developing countries.

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“…A product family with common operations can also be formed based on their commonality of alternative machines considering machine usage. Grouping methods such as the average linkage clustering method proposed by Navaei and ElMaraghy (2014) can derive a products-machines usage matrix through linking a products-operations similarity matrix and an operations-machines probability matrix. A hybrid methodology based on networked sequence of operations and operational similarity is used to group parts/product variants/models from a large product family in order to reduce changeover time and ease reconfiguration (Navaei and ElMaraghy, 2016).…”

Section: Figure 1 Rms Chain With a Product-process Reconfiguration Linkmentioning

confidence: 99%

RMS capacity utilisation: product family and supply chain

Abdi

Labib²

2016

International Journal of Production Research

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The paper contributes to development of RMS through linkage with external stakeholders such as customers and suppliers of parts/raw materials to handle demand fluctuations that necessitate information sharing across the supply chain tiers. RMS is developed as an integrated supply chain hub for adjusting production capacity using a hybrid methodology of decision trees and Markov analysis. The proposed Markov Chain model contributes to evaluate and monitor system reconfigurations required due to changes of product families with consideration of the products life cycles. The simulation findings indicate that system productivity and financial performance in terms of the profit contribution of product-process allocation will vary over configuration stages. The capacity of an RMS with limited product families and/or limited model variants becomes gradually inoperative whilst approaching upcoming configuration stages due to the end of product life cycles. As a result, reconfiguration preparation is suggested quite before ending life cycle of an existing product in process, for switching from a product family to a new/another product family in the production range, subject to its present demand. The proposed model is illustrated through a simplified case study with given product families and transition probabilities.

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Grouping Product Variants based on Alternate Machines for Each Operation

Cited by 10 publications

References 12 publications

Standardising Maintenance Jobs to Improve Grouping Decision Making

Standardising Maintenance Jobs to Improve Grouping Decision Making

Development of part families for a reconfigurable machine

RMS capacity utilisation: product family and supply chain

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