| 1. |
- Kimita, Koji, et al.
(författare)
-
A failure analysis method for designing highly reliable product-service systems
- 2018
-
Ingår i: Research in Engineering Design. - : Springer London. - 0934-9839 .- 1435-6066. ; 29:2, s. 143-160
-
Tidskriftsartikel (refereegranskat)abstract
- Recently, product-service systems (PSSs), which create value by integrating a physical product and a service, have been attracting attention. In PSSs, it is critical for a provider to offer highly reliable products and services. To do so, the provider needs to effectively and efficiently detect possible failures, and then, take adequate measures against them in the conceptual design stage. However, in current studies on product failure analysis, service aspects are not covered in analyzing failure causes and developingmeasures. On the other hand, product aspects are hardly considered in existing methods of service failure analysis. To fill the gap, this paper proposes a method for failureanalysis in PSS design called PSS failure mode and effect analysis (PSS FMEA). Especially, this paper extends theframework of FMEA, and then, a procedure for PSS FMEA is introduced so that designers can analyze failures and develop measures in consideration of both product andservice aspects. Furthermore, the proposed method supports designers in finding new business opportunities. The proposed method was applied to a real offering of products and services by a cleaning machine provider and found effective.
|
|
| 2. |
- Kimita, Koji, et al.
(författare)
-
A practical approach for managing uncertainty in remanufacturing : Identifying leverage points using design structure matrix
- 2020
-
Ingår i: <em>Proceedings of the ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference</em>. - USA : ASME Press. - 9780791883952
-
Konferensbidrag (refereegranskat)abstract
- Remanufacturing is a crucial component for our societies tomove toward a circular economy. Compared to newmanufacturing, the distinctive nature of remanufacturing isfound to have high variability, high uncertainty and, thereby,complexity. Therefore, remanufacturers need to enhance theirability to adjust their systems flexibly. Especially, the ability toreconfigure the production planning and control is crucial forreacting to the high variability and uncertainty. However, fewpractical methods to do that are available so far. Therefore, tosolve this problem, this paper aims to propose a method fordesigning processes of production planning and control inremanufacturing based on the concept of loosely coupledsystems. In the proposed method, Design Structure Matrix(DSM) is applied to identify loosely coupled subsystems thatenable to localize impacts of changes within themselves. Thesesubsystems are also utilized to appropriately determine leveragepoints, as well as allocate human resource. Through theapplication to a real case of remanufacturing, the proposedmethod was found to be effective for reconfiguring teams andprocesses for production planning and control depending ongiven uncertainties, as well as performing production planningand control activities efficiently.
|
|
| 3. |
|
|
| 4. |
- Kimita, Koji, et al.
(författare)
-
Failure analysis method for enhancing circularity through systems perspective
- 2021
-
Ingår i: Journal of Industrial Ecology. - : Wiley. - 1530-9290 .- 1088-1980. ; 25:3, s. 544-562
-
Tidskriftsartikel (refereegranskat)abstract
- Recently, a circular economy has attracted global attention as an approach for addressing material security and resource-efficiency issues. As our societies shift toward a circular economy, manufacturers need to not only produce environmentally conscious products but to also realize reliable systems that will ensure the closure of the loops of the products, components, and materials. To do so, early-stage design is crucial to effectively and efficiently detect possible failures and then take adequate countermeasures against them. Although a few methods of failure analysis have been proposed to address environmental issues, these methods have failed to consider the cause–effect relationships among failures. This will hinder manufacturers from identifying core problems that should be addressed in a given system. Therefore, this study extends failure mode and effect analysis, which is an engineering technique used to address potential failures, by addressing the entire system reliability in relation to circularity. As a result of a case study of a manufacturer aiming to increase circularity with their products on the market, we revealed that the proposed method is useful in the early stage of design to (a) identify failure modes where effects are largely given to or received from other failures, (b) develop countermeasures effectively by addressing root causes of failures, and (c) find an opportunity to collaborate with external actors.
|
|
| 5. |
- Kimita, Koji, et al.
(författare)
-
Requirement Analysis for User-Oriented Service Design
- 2009
-
Ingår i: Asian International Journal of Science and Technology Production & Manufacturing Engineering. - : King Mongkut’s University of Technology North Bangkok Press. - 1906-151X. ; 2:3, s. 11-23
-
Tidskriftsartikel (refereegranskat)abstract
- In manufacturing, systems combining physical products and services have been attracting much attention. For such systems, designers need to focus on customer requirements rather than on the achievement of functionality. Methods are proposed in this paper for the analysis of requirements and extension of the design process proposed in Service Engineering. The focus is on the specification of service users in a client organization and on the extraction of their requirements in consideration of the organizational objectives of the client. The effectiveness of the method is demonstrated by an application, where a bank is a target client of a service.
|
|
| 6. |
|
|
| 7. |
- Koji, Kimita, et al.
(författare)
-
A Method for Remanufacturing Process Planning and Control Using Loosely Coupled Systems
- 2021
-
Ingår i: Journal of manufacturing science and engineering. - : ASME. - 1087-1357 .- 1528-8935. ; 143:10, s. 1-17
-
Tidskriftsartikel (refereegranskat)abstract
- Remanufacturing is a crucial component for our societies to move toward a circular economy. Compared with new manufacturing, the distinctive nature of remanufacturing is found to have high variability, high uncertainty and, thereby, complexity. Therefore, remanufacturers need to be able to adapt to the complexity and to flexibly adjust their processes. Especially, the ability to remanufacturing process planning and control is important. However, few practical methods supporting that are available so far. Therefore, this paper aims to propose a method for designing teams and processes in remanufacturing based on the concept of loosely coupled systems. In the proposed method, design structure matrix (DSM) is applied to identify loosely coupled sub-systems that enable to localize impacts of changes within themselves. These sub-systems are also regarded as cross-functional teams that reduce coordination efforts among line departments and, therefore, increase the adaptability against uncertainties. As a preliminary validation, the proposed method was applied to a real case of remanufacturing, and then found to be effective for creating teams and processes for remanufacturing process planning and control depending on given uncertainties.
|
|
| 8. |
- Sakao, Tomohiko, 1969-, et al.
(författare)
-
Design research towards a circular economy : focusing on product/service systems and remanufacturing
- 2021
-
Ingår i: Design Engineering. - Tokyo : Japan Society for Design Engineering. - 0919-2948 .- 2188-9023. ; 56:4, s. 153-165
-
Forskningsöversikt (övrigt vetenskapligt/konstnärligt)abstract
- This contribution presents a view to design research aiming at our societies’ transformations to a circular economy with focusing on product/service systems (PSSs) and remanufacturing. First, what could be design objects in this context is touched upon referring to the state of the art in design research. Then, the potentials, characteristics, and possible barriers of the design are discussed. This is followed by two cases of design research on PSSs and remanufacturing as examples contextualizing the foregoing on industrial practices in Europe. A perspective of future research is provided lastly to conclude the paper.
|
|
