Volume 4, Issue 1 (sprig&summer(number 1&2) 2007)                   ioh 2007, 4(1): 10-14 | Back to browse issues page

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Abstract:   (6828 Views)

  Background and Aims

  Permit to work (PTW) system as an operational control methods, is an accepted system for control of maintenance activities hazards in chemical industries. The main objective of this study was degree of conformity analysis between existing situation of PTW system and audit criteria.



  In this cross - sectional study, PTW system was audited in an oil and gas extracting   industry by checklist.



  Major nonconformities include outdating of system legal and regulation, non existence of permit for majority of dangerous activities, unidentified training needs, incomplete  identification and risk assessment of maintenance hazards before doing them, unspecified

  inspection and survey frequencies during works and nonexistence of scheduled auditing for the system.



  PTW audit results showed that there is a noticeable gap between audit criteria and  audit evidences. So that the examined system had nonconformities in all of the checklist sections system, training and competency, permit, coordination and monitoring.


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Type of Study: Research | Subject: Micro Ergonomics
Received: 2011/08/1 | Published: 2007/04/15