| 1. Identity statement | |||||||
| Reference Type | Conference Paper (Conference Proceedings) | ||||||
| Site | mtc-m16b.sid.inpe.br | ||||||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | ||||||
| Repository | dpi.inpe.br/ce@80/2007/01.09.07.08 (restricted access) | ||||||
| Last Update | 2007:05.18.20.12.24 (UTC) administrator | ||||||
| Metadata Repository | dpi.inpe.br/ce@80/2007/01.09.07.08.28 | ||||||
| Metadata Last Update | 2018:06.05.03.33.43 (UTC) administrator | ||||||
| Citation Key | MishimaMasuKond:2007:PrEfIn | ||||||
| Title | Proposal of an Efficiency Index for Supporting System Configuration Design  | ||||||
| Format | Print; CD-ROM; On-line. | ||||||
| Year | 2007 | ||||||
| Access Date | 2024, Apr. 27 | ||||||
| Secondary Type | CI | ||||||
| Number of Files | 4 | ||||||
| Size | 956 KiB | ||||||
| 2. Context | |||||||
| Author | 1 Mishima, Nozomu 2 Masui, Keijiro 3 Kondo, Shinsuke | ||||||
| Affiliation | 1 Advanced Manufacturing Research Institute, AIST, Japan 2 Advanced Manufacturing Research Institute, AIST, Japan 3 Advanced Manufacturing Research Institute, AIST, Japan | ||||||
| Author e-Mail Address | 1 n-mishima@aist.go.jp 2 k-masui@aist.go.jp 3 kondou-shinsuke@aist.go.jp | ||||||
| Editor | Loureiro, Geilson Curran, Ricky | ||||||
| e-Mail Address | n-mishima@aist.go.jp | ||||||
| Conference Name | ISPE International Conference on Concurrent Engineering, 14 (CE 2007). | ||||||
| Conference Location | São José dos Campos | ||||||
| Date | 2007, July 16-20 | ||||||
| Publisher | Instituto Nacional de Pesquisas Espaciais (INPE) | ||||||
| Publisher City | São José dos Campos | ||||||
| Pages | 47-54 | ||||||
| Book Title | Proceedings | ||||||
| Organization | Instituto Nacional de Pesquisas Espaciais (INPE) | ||||||
| History (UTC) | 2007-02-19 08:05:08 :: n-mishima@aist.go.jp -> ce2007 :: 2007-03-29 12:42:19 :: ce2007 -> n-mishima@aist.go.jp :: 2007-04-10 10:13:00 :: n-mishima@aist.go.jp -> ce2007 :: 2007-04-12 21:44:25 :: ce2007 -> administrator :: 2007-05-18 15:20:36 :: administrator -> ce2007 :: 2007-05-21 14:36:09 :: ce2007 -> administrator :: 2018-06-05 03:33:43 :: administrator -> marciana :: 2007 | ||||||
| 3. Content and structure | |||||||
| Is the master or a copy? | is the master | ||||||
| Content Stage | completed | ||||||
| Transferable | 1 | ||||||
| Keywords | microfactory system configuration efficiency index environmental impact | ||||||
| Abstract | Demands of various miniature mechanical parts and products such as for watches, cameras, medical devices, miniature die-sets, and so on, are increasing more and more. Contrarily, manufacturing systems for those parts and products are becoming larger and more complicated. The research group including the authors developed the first prototype of a microfactory which consisted of miniature machine tools and manipulators, in 2000, as a countermeasure for the situation. We insisted that the advantage of the microfactory would be its capability to reduce environmental impact and costs of manufacturing, especially for diverse-types-and-small-quantity production. Since the smallness of the each machine enables factory layout change, the microfactory can control the increase of the costs when the designs of products have been modified. By replacing conventional manufacturing systems by microfactories, electrical power and initial cost of the machines can be also reduced. On the other hand, machines of the microfactory should be designed small and simple, to ensure the abovementioned advantages. It means that those machines cannot have extra power, throughput, process capability, and so on. So, in the microfactory, many design issues such as machine design, system design and process design should be solved concurrently. And for the purpose, quantitative evaluation method for machines, systems and processes of the microfactories are required first. However, the effect of the microfactory in reducing environmental impact and costs has not been examined quantitatively. If it is possible to show how microfactory can contribute to enhance the efficiency of the production systems, application area of the microfactory will greatly expand. So, as the first step of the quantitative evaluation of system design, this paper proposes a simple efficiency index based on the overall throughput, machine cost, labor cost, electricity cost, environmental impact measured by electrical power and material consumption. The proposed efficiency index is expressed by the equation, Ef=F/SQRT(C*E), where Ef is the efficiency index, F is the functionality of the system, C is the overall cost and E is the overall environmental impact. In the paper F is simply expressed by the throughput of the system. C is the sum of the labor cost, the machine cost and the electricity cost, and E is sum of equivalent CO2 exhaust of power consumption and materials for the machines. Using the abovementioned microfactory as an example, the paper tries to examine whether the proposed index is useful in evaluating and improving the system configuration. The calculation results indicate that there are some configurations that are more efficient than the others. The calculation also shows that efficiencies of miniature systems like the microfactory are not very less than those of conventional mass production systems, when the required throughput is not very high. The result leads us to conclude that the proposed efficiency index is useful in evaluating the system design. It also insists that microfactory-like systems are hopeful for future manufacturing systems in which high functionality, low cost and low environmental impact are required. | ||||||
| Area | ETES | ||||||
| Type | Systems Engineering | ||||||
| doc Directory Content | access | ||||||
| source Directory Content |
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| agreement Directory Content | there are no files | ||||||
| 4. Conditions of access and use | |||||||
| Language | en | ||||||
| Target File | paper.pdf | ||||||
| User Group | administrator n-mishima@aist.go.jp administrator | ||||||
| Visibility | shown | ||||||
| Read Permission | deny from all and allow from 150.163 | ||||||
| 5. Allied materials | |||||||
| Host Collection | lcp.inpe.br/ignes/2004/02.12.18.39 cptec.inpe.br/walmeida/2003/04.25.17.12 | ||||||
| 6. Notes | |||||||
| Mark | 1 | ||||||
| Empty Fields | archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition group identifier isbn issn label lineage mirrorrepository nextedition nexthigherunit notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor shorttitle sponsor tertiarymark tertiarytype url versiontype volume | ||||||
| 7. Description control | |||||||
| e-Mail (login) | marciana | ||||||
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