A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance
In periodic condition monitoring, the main problem lies in determining the inspection time intervals. This paper presents a new method for setting an optimum calendar to inspect a critical component that fails due to wear and tear as described by a Weibull probability function. By considering a set...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/18/8715 |
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| author | Rui Assis Pedro Carmona Marques |
| author_facet | Rui Assis Pedro Carmona Marques |
| author_sort | Rui Assis |
| collection | DOAJ |
| description | In periodic condition monitoring, the main problem lies in determining the inspection time intervals. This paper presents a new method for setting an optimum calendar to inspect a critical component that fails due to wear and tear as described by a Weibull probability function. By considering a set of inspection intervals, such that reliability between every two inspections is kept equal or below a pre-set threshold while keeping the total costs of inspection, degraded production, consequences of failure, and repair to a minimum. The resulting calendar may be adjusted dynamically over time as inspections take place and test results are found to be negative, by considering the inspector’s confidence in the test and the likelihood of the method’s yielding false negatives. Consequently, the method becomes self-adjustable as it returns a new calendar after the observations of each test are known and properly interpreted. There are several studies that deal with this issue, but none addresses the concept of safe and unsafe time windows which results from merging two other concepts: descendant inspection time intervals and the time delay between a potential failure and a functional failure (the P–F period). |
| first_indexed | 2024-03-10T07:54:58Z |
| format | Article |
| id | doaj.art-3869655c44c545319a93da1e5da7f059 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T07:54:58Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3869655c44c545319a93da1e5da7f0592023-11-22T11:57:06ZengMDPI AGApplied Sciences2076-34172021-09-011118871510.3390/app11188715A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive MaintenanceRui Assis0Pedro Carmona Marques1EIGeS—Research Centre in Industrial Engineering, Management and Sustainability, Lusófona University, Campo Grande 376, 1749-024 Lisbon, PortugalEIGeS—Research Centre in Industrial Engineering, Management and Sustainability, Lusófona University, Campo Grande 376, 1749-024 Lisbon, PortugalIn periodic condition monitoring, the main problem lies in determining the inspection time intervals. This paper presents a new method for setting an optimum calendar to inspect a critical component that fails due to wear and tear as described by a Weibull probability function. By considering a set of inspection intervals, such that reliability between every two inspections is kept equal or below a pre-set threshold while keeping the total costs of inspection, degraded production, consequences of failure, and repair to a minimum. The resulting calendar may be adjusted dynamically over time as inspections take place and test results are found to be negative, by considering the inspector’s confidence in the test and the likelihood of the method’s yielding false negatives. Consequently, the method becomes self-adjustable as it returns a new calendar after the observations of each test are known and properly interpreted. There are several studies that deal with this issue, but none addresses the concept of safe and unsafe time windows which results from merging two other concepts: descendant inspection time intervals and the time delay between a potential failure and a functional failure (the P–F period).https://www.mdpi.com/2076-3417/11/18/8715conditional maintenanceinspection intervalsreliabilityP–F curve |
| spellingShingle | Rui Assis Pedro Carmona Marques A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance Applied Sciences conditional maintenance inspection intervals reliability P–F curve |
| title | A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance |
| title_full | A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance |
| title_fullStr | A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance |
| title_full_unstemmed | A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance |
| title_short | A Dynamic Methodology for Setting Up Inspection Time Intervals in Conditional Preventive Maintenance |
| title_sort | dynamic methodology for setting up inspection time intervals in conditional preventive maintenance |
| topic | conditional maintenance inspection intervals reliability P–F curve |
| url | https://www.mdpi.com/2076-3417/11/18/8715 |
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