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A systems approach to the assessment of mental workload in a safety-critical environment
Thesis (PhD)--University of Pretoria, 2008.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613649441390592 |
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| access_status_str | Open Access |
| author2 | Cilliers, P.J. |
| author_browse | Cilliers, P.J. |
| author_facet | Cilliers, P.J. |
| collection | Thesis |
| dc_rights_str_mv | ©University of Pretoria 2008 D533/ |
| description | Thesis (PhD)--University of Pretoria, 2008. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/29407 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:30.213Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/29407 A systems approach to the assessment of mental workload in a safety-critical environment Cilliers, P.J. Van Tonder, J.A. jjpre@mweb.co.za Kruger, Adele Cognitive load Workload Mental workload Mental workload assessment Mental workload prediction Stress UCTD Thesis (PhD)--University of Pretoria, 2008. The objective of this study is to develop a quantified method for determining the mental workload imposed on train control officers (TCOs) and to express this mental workload by means of an index that is objective and can stand up to the tests of validity and reliability. The method addresses an existing operational shortcoming in Spoornet train control operations and could be used as a tool for predicting the mental workload imposed on operators at particular train control centres. The method could be applied to manage and improve operational safety in the rail transport environment. A participative systems approach was followed in the development of the measuring methodology. A work group comprising expert users of the specific train control system was involved in identifying task factors and assigning weights for task and moderating factors. The newly developed Mental Workload Index (MWLI) consists of three task factors and eleven moderating factors, each with a different weight in terms of its contribution to overall mental workload. The work group performed several iterations to reach final consensus on the following task factors and their respective contributions to the MWLI: the number of data transactions, the number of authorisations, and the number of communications via telephone and radio. The systems approach used in the development process is discussed, and the final index with the task and moderating factors is presented. In conclusion, the value and possible application of the MWLI are discussed. The MWLI is shown to provide an objective method for the assessment and prediction of mental workload in the train control environment. Electrical, Electronic and Computer Engineering unrestricted 2013-09-07T15:36:15Z 2008-12-15 2013-09-07T15:36:15Z 2008-09-02 2008-12-15 2008-11-11 Thesis 2008 D533/gm http://hdl.handle.net/2263/29407 http://upetd.up.ac.za/thesis/available/etd-11112008-133320/ ©University of Pretoria 2008 D533/ application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Cognitive load Workload Mental workload Mental workload assessment Mental workload prediction Stress UCTD A systems approach to the assessment of mental workload in a safety-critical environment |
| title | A systems approach to the assessment of mental workload in a safety-critical environment |
| title_full | A systems approach to the assessment of mental workload in a safety-critical environment |
| title_fullStr | A systems approach to the assessment of mental workload in a safety-critical environment |
| title_full_unstemmed | A systems approach to the assessment of mental workload in a safety-critical environment |
| title_short | A systems approach to the assessment of mental workload in a safety-critical environment |
| title_sort | systems approach to the assessment of mental workload in a safety critical environment |
| topic | Cognitive load Workload Mental workload Mental workload assessment Mental workload prediction Stress UCTD |
| url | http://hdl.handle.net/2263/29407 http://upetd.up.ac.za/thesis/available/etd-11112008-133320/ |