• Functional Defects
  • Pollution
  • Difficult to Access/Observe
  • Hard to Load/Operate
  • Unsafe
  • Safety, Health, Environment, Quality (SHEQ) “unfriendly”
  • Undesirable Tasks

“F” Tags are used to highlight Deviations, Faults or Abnormalities.

3 Types of F-Tags


Safety F-Tags are written by everyone for everyone.  Mechanics or operators can close these. Yellow color.


  • Operator F-Tags are Blue.
  • Operator means anyone non-maintenance (ie. Operators, Supervisors, Cleaners, Sanitation, etc.) to fix the abnormality.


  • Maintenance F-Tags are Red.
  • These F-Tags require Electricians, Mechanics, etc. to fix the abnormality.


  • F-Tag (is a visual work order) is a tag that is used to identify problems with the machines

“Four Lists” are used to track the F-Tags:

  • Abnormality List
  • F-Tag Tally Sheet
  • SOC (Sources of Contamination) List
  • HTA (Hard-to-Access) List

F-Tag ProcessAutonomous Maintenance

Where Are Abnormalities Found? Typical F-Tags

  • Broken Parts
  • Wear, Play, Rattling
  • Dust, Dirt, Corrosion
  • Cracks, drip marks,
  • Deformation, Surface Damage
  • Noisy, Hot, Cold, Odour etc…

F-Tag Tracking

  • To track the F-Tags we write as part of AM activities, the team will create an Activity Board called the F-Tag Tracking Centre
  • This board will show the “Three Lists”, and keep track of how many F-Tags are written and how many have been completed
  • The next page shows an example of an F-Tag Tracking Centre

Breakdown evidence tag


    1. Assuming that you are referring to 7 steps of Autonomous Maintenance, f-tag are used through all steps from the moment it would be implemented during step 1.

      Tagging is a process of identifying issues (defects), while doing cleaning and or inspections, as well while running equipment, and not related to a particular step of AM. It is a visual tool, that helps to see if equipment has any issues that needs to be resolved.

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