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Teymourian, K., Tretten, P., Seneviratne, D. & Galar, D. (2021). Ergonomics Evaluation in Designed Maintainability:Case Study Using 3 DSSPP. Management Systems in Production Engineering, 29(4), 309-319
Open this publication in new window or tab >>Ergonomics Evaluation in Designed Maintainability:Case Study Using 3 DSSPP
2021 (English)In: Management Systems in Production Engineering, ISSN 2299-0461, Vol. 29, no 4, p. 309-319Article in journal (Refereed) Published
Abstract [en]

Maintainability is one of the design parameters (reliability, availability, maintainability, and safety (RAMS)) and maintenance is needed to keep the respective design in sustainable use. At the same time, the human is involved in the form of interface and interaction in an engineered product/system designed. Ergonomics is a multi-disciplinary science that considers human capabilities and limitations in a broader sense. The objective of this paper is to integrate ergonomics into the maintainability design process in order to facilitate maintenance operation in lesser; time, cost, easier operation as well as the well-being of human who is involved. In other words, good ergonomics lead to good economics and in a broader sense, sustainability. This investigation shows that designing comfortable workplaces and lesser workload for maintenance operators will be beneficial for the maintainability design process and also improve the meantime to repair MTTR. In order to evaluate the effect of designed work-place and workload on maintainers 3 D Static Strength Prediction Program (3D SSPP) that is commonly used as an ergonomics evaluation tool in scientific studies was applied.

Place, publisher, year, edition, pages
Sciendo, 2021
Keywords
3D Static Strength Prediction Program, ergonomics, low back compression, maintainability
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-88929 (URN)10.2478/mspe-2021-0039 (DOI)000753841800009 ()2-s2.0-85122811902 (Scopus ID)
Note

Validerad;2022;Nivå 2;2022-01-27 (johcin)

Available from: 2022-01-27 Created: 2022-01-27 Last updated: 2022-04-12Bibliographically approved
Teymourian, K. (2021). Integrating Ergonomics in Maintainability Design Process. (Doctoral dissertation). Luleå: Luleå University of Technology
Open this publication in new window or tab >>Integrating Ergonomics in Maintainability Design Process
2021 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Engineered designed systems or products influence the intended humans through their interactions and interface with the systems. A system or product is an object whereas a human is a living complex system, and most of human characteristics, such as capabilities and limitations, are known. During the design process, from the conceptual phase to phasing out, maintainability engineers are involved in making the designed system/product easier for its maintaining. Maintainability is a process and it is one of the design parameters, which will affect maintenance that is required as a result of the design. Maintainability and maintenance are two innate factors in a system/product that influence the health of human users.  Much literature and many reports focus on human maintenance operators who, due to their working conditions, confront with many; risks, incidents, and accidents and the consequences of these situations result in many serious injuries, illnesses, and even fatalities. These unanticipated events result from a lack of synchronization between the design of the tasks required for maintenance performance, human capabilities, and limitations. The argument of this thesis is that an active integration of cognizant ergonomics expertise, in the maintainability design process, will result in viable system/product functionality, cost savings, the well-being of involved humans, and organizational efficiencies.  In study I, the simulation approach was used to identify the critical posture of the maintenance personnel, and to implement the defined postures with minimal loads on the personnel who used the equipment in a practical scenario. The simulation results were given to the designers to use to improve the workplace/equipment, in order to reduce maintenance time, which is a key parameter in maintainability. The study also described product design workflow, and the role of ergonomist participation in the design. In study II, two relevant tools, Hierarchical Task Analysis (HTA) and William Fine method, were applied in order to prevent serious accidents and make task performances safer for maintainers. The results presented a clearer understanding of the differences between “work-as-done” and “work-as-imagined”, for both manager and operators. Study III used an injuries survey, completed by maintenance operators, in a study of compression on their lower backs. This study reveals an absence of effective maintainability design during the product design stage. The general conclusion of these studies is that maintenance operators, due to the nature of their work, are exposed to more risks, and that ergonomics considerations, during the maintainability design, will lead to healthier working conditions. Different ergonomics tools were used and the results have shown how working conditions improved. These improvements were suboptimal concerning micro and macro-ergonomics aspects, due to the pre-existing working situations.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2021. p. 152
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Ergonomics, maintainability, safety, risk analysis, low back compression, ALBA, 3 D Static Strength Prediction Program
National Category
Applied Mechanics
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-87474 (URN)978-91-7790-948-4 (ISBN)978-91-7790-949-1 (ISBN)
Public defence
2021-12-01, F1031, Luleå Tekniska Universitet, Luleå, 10:00 (English)
Opponent
Supervisors
Available from: 2021-10-13 Created: 2021-10-12 Last updated: 2024-04-11Bibliographically approved
Ramezani, Z., Pourdarvish, A. & Teymourian, K. (2020). A Novel Angle-Based Learning Framework on Semi-supervised Dimensionality Reduction in High-Dimensional Data with Application to Action Recognition. Arabian Journal for Science and Engineering, 45(12), 11051-11063
Open this publication in new window or tab >>A Novel Angle-Based Learning Framework on Semi-supervised Dimensionality Reduction in High-Dimensional Data with Application to Action Recognition
2020 (English)In: Arabian Journal for Science and Engineering, ISSN 2193-567X, Vol. 45, no 12, p. 11051-11063Article in journal (Refereed) Published
Abstract [en]

The existing outliers in high-dimensional data create various challenges to classify datasets such as the exact classification with imbalanced scatters. In this paper, we propose an angle-based framework as Angle Global and Local Discriminant Analysis (AGLDA) to consider imbalanced scatters. AGLDA chooses an optimal subspace by using angle cosine to achieve appropriate scatter balance in the dataset. The privilege of this method is to classify datasets with the effect of outliers by finding optimal subspace in high-dimensional data. Generally, this method is more effective and more reliable than other methods to classify data when there are outliers. Besides, human posture classification has been used as an application of the balanced semi-supervised dimensionality reduction to assist human factor experts and designers of industrial systems for diagnosing the type of maintenance crew postures. The experimental results show the efficiency of the proposed method via two real case studies, and the results have also been verified by comparing it with other approaches.

Place, publisher, year, edition, pages
Springer, 2020
Keywords
High-dimensional data, Dimensionality reduction, Human factor, Angle-based discriminant, Scatter balance
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-81043 (URN)10.1007/s13369-020-04869-w (DOI)000572302500002 ()2-s2.0-85091403486 (Scopus ID)
Note

Validerad;2020;Nivå 2;2020-12-03 (alebob)

Available from: 2020-10-07 Created: 2020-10-07 Last updated: 2020-12-03Bibliographically approved
Teymourian, K., Seneviratne, D. & Galar, D. (2019). Integrating Ergonomics in Maintanability: A Case Study from Manufacturing Industry. Journal of Industrial Engineering and Management Science, 2018(1), 131-150, Article ID 8.
Open this publication in new window or tab >>Integrating Ergonomics in Maintanability: A Case Study from Manufacturing Industry
2019 (English)In: Journal of Industrial Engineering and Management Science, E-ISSN 2446-1822, Vol. 2018, no 1, p. 131-150, article id 8Article in journal (Refereed) Published
Abstract [en]

Maintainability is key part of Reliability, Availability, Maintainability and Safety (RAMS) estimation and prediction in complex assets. Indeed, availability calculation comprises accurate estimation of maintainability and frequently, it is just a time stamp for mean time to repair (MTTR) estimations. However, maintainability is a human related figure where the skill, capabilities, tools and the design of the asset play key role in its performance. The aim of this article is to describe the effects of ergonomists’ contribution during maintainability process for system/products design. System designer thinking in system and its subsystem in a way of technical functionality. On the other hand, ergonomists are expertise in human capability and limitation. If human become a part of system than their interface and interaction become crucial factors in a success of system performance and its sustainability. In this paper, it has discussed three main issues that help the process of maintainability design. These issues are safety, task analysis and risk analysis. It has also touched reliability engineer’s task to increase Overall Equipment Effectiveness (OEE). These issues are explained via a case study from a manufacturing industry.

Place, publisher, year, edition, pages
River Publishers, 2019
Keywords
Maintainability, Hierarchical Task Analysis (HTA), Ergonomics, Risk, Safety
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-74042 (URN)10.13052/jiems2446-1822.2018.008 (DOI)
Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved
Teymourian, K., Seneviratne, D. & Galar, D. (2018). Ergonomics in Maintainability: System and Product Design Process. In: José Torres Farinha; Diego Galar (Ed.), Proceedings of Maintenance Performance Measurement and Management (MPMM) Conference 2018: . Paper presented at Maintenance Preformance Measurement and Management, Coimbra, Portugal, 21-22 June, 2018 (pp. 18-23). FCTUC-DEM
Open this publication in new window or tab >>Ergonomics in Maintainability: System and Product Design Process
2018 (English)In: Proceedings of Maintenance Performance Measurement and Management (MPMM) Conference 2018 / [ed] José Torres Farinha; Diego Galar, FCTUC-DEM , 2018, p. 18-23Conference paper, Published paper (Refereed)
Abstract [en]

Maintainability is key part of RAMS estimation and prediction in complex assets. Indeed, availability calculation comprises accurate estimation of maintainability and many times, it is just a time stamp for MTTR estimations. However, maintainability is a human related figure where the skill, capabilities, tools and the design of the asset play key role in its performance. The aim of this article is to describe the effects of ergonomist contribution during maintainability process for system/products design. System designer thinking in system and its subsystem in a way of technical functionality. On the other hand, ergonomist are expertise in human capability and limitation. If human, become a part of system than their interface and interaction become crucial factors in a success of system performance and its sustainability. In this paper, it has discussed four main issues that help the process of maintainability design. These issues are safety (Safety I and Safety II), task analysis (Hierarchical Task Analysis (HTA) as tool) and risk analysis (using William Fine method). It has also touched reliability engineer’s task in order to increase Overall Equipment Effectiveness (OEE).

Place, publisher, year, edition, pages
FCTUC-DEM, 2018
Keywords
maintainability, HTA, ergonomics, risk, safety
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-73647 (URN)
Conference
Maintenance Preformance Measurement and Management, Coimbra, Portugal, 21-22 June, 2018
Available from: 2019-04-15 Created: 2019-04-15 Last updated: 2021-06-04Bibliographically approved
Teymourian, K., Seneviratne, D. & Galar, D. (2017). Ergonomics Contribution in Maintainability. In: Diego Galar, Dammika Seneviratne (Ed.), Proceedings of MPMM 2016: 6th International Conference on Maintenance Performance Measurement and Management, 28 November 2016, Luleå, Sweden. Paper presented at Maintenance Performance and Measurement and Management 2016(MPMM 2016). November 28, Luleå, Sweden (pp. 180-186). Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Ergonomics Contribution in Maintainability
2017 (English)In: Proceedings of MPMM 2016: 6th International Conference on Maintenance Performance Measurement and Management, 28 November 2016, Luleå, Sweden / [ed] Diego Galar, Dammika Seneviratne, Luleå: Luleå tekniska universitet, 2017, p. 180-186Conference paper, Published paper (Refereed)
Abstract [en]

The objective of this paper is to describe an ergonomics contribution in maintainability. The economical designs, inputs and training helps to increase themaintainability indicators for industrial devices. This analysis can be helpful, among other cases, to compare systems, to achieve a better design regarding maintainability requirements, to improve this maintainability under specific industrial environment and to foresee maintainability problems due to eventual changes in a device operation condition. With this purpose, this work first introduces the notion of ergonomics and human factors, maintainability and the implementation of assessment of human postures, including some important postures to perform maintenance activities. A simulation approach is used to identify the critical posture of the maintenance personnel and implements the defined postures with minimal loads on the personnel who use the equipment in a practical scenario. The simulation inputs are given to the designers to improve the workplace/equipment in order to high level of maintainability. Finally, the work concludes summarizing the more significant aspects and suggesting future research.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2017
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-63919 (URN)978-91-7583-841-0 (ISBN)
Conference
Maintenance Performance and Measurement and Management 2016(MPMM 2016). November 28, Luleå, Sweden
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2018-05-09Bibliographically approved
Teymourian, K., Seneviratne, D. & Galar, D. (2017). Ergonomics contribution in maintainability. Management Systems in Production Engineering, 25(3), 217-223, Article ID 31.
Open this publication in new window or tab >>Ergonomics contribution in maintainability
2017 (English)In: Management Systems in Production Engineering, ISSN 2299-0461, Vol. 25, no 3, p. 217-223, article id 31Article in journal (Refereed) Published
Abstract [en]

The objective of this paper is to describe an ergonomics contribution in maintainability. The economical designs, inputs and training helps to increase the maintainability indicators for industrial devices. This analysis can be helpful, among other cases, to compare systems, to achieve a better design regarding maintainability requirements, to improve this maintainability under specific industrial environment and to foresee maintainability problems due to eventual changes in a device operation conditions. With this purpose, this work first introduces the notion of ergonomics and human factors, maintainability and the implementation of assessment of human postures, including some important postures to perform maintenance activities. A simulation approach is used to identify the critical posture of the maintenance personnel and implements the defined postures with minimal loads on the personnel who use the equipment in a practical scenario. The simulation inputs are given to the designers to improve the workplace/equipment in order to high level of maintainability. Finally, the work concludes summarizing the more significant aspects and suggesting future research.

Place, publisher, year, edition, pages
Walter de Gruyter, 2017
Keywords
ergonomics, maintainability, human posture, human factors, ALBA simulation
National Category
Other Engineering and Technologies not elsewhere specified Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-65588 (URN)10.1515/mspe-2017-0031 (DOI)000408931800011 ()
Note

Validerad;2017;Nivå 2;2017-10-03 (rokbeg)

Available from: 2017-09-12 Created: 2017-09-12 Last updated: 2021-03-11Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9235-7861

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