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Manual vs Automatic Downtime Tracking: Why Your Pareto Is Probably Wrong

Manual vs Automatic Downtime Tracking: Why Your Pareto Is Probably Wrong

Manual downtime logs miss short stops and mislabel causes. Automatic capture sees everything. The difference reshapes which losses you think you have.
Manual vs Automatic Downtime Tracking: Why Your Pareto Is Probably Wrong
Manual vs Automatic Downtime Tracking: Why Your Pareto Is Probably Wrong

Key takeaways

  • Manual downtime logs depend on operators remembering and classifying stops.
  • Automatic capture records every stop, including the micro-stops people never log.
  • Manual data systematically under-reports short stops and mislabels causes.
  • A Pareto built on manual data often targets the wrong losses entirely.

Short answer: Manual downtime tracking relies on operators noticing, timing, and classifying every stop — so short stops vanish and causes get guessed. Automatic capture records every stoppage from the machine signal, then asks the operator only to classify. The result: manual data hides micro-stops and mislabels causes, so the Pareto you act on is often wrong. See also oee for manufacturing.

What manual tracking misses

  • Micro-stops too short to bother logging.
  • Stops during busy periods nobody records.
  • Causes guessed from memory at shift end.

What automatic tracking adds

  • Every stop captured from the machine.
  • Exact timing, no rounding.
  • Operator classifies, machine measures.

Why the Pareto changes

When micro-stops finally appear in the data, they often jump to the top of the Pareto — a loss category manual logs hid completely. Plants regularly discover their real biggest loss was invisible.

The hybrid that works

Let the machine detect and time the stop; let the operator add the reason. You get complete, accurate timing with human context — the best of both.

How OEE relates

Accurate downtime data is the foundation of trustworthy OEE. Manual gaps inflate Availability and hide the micro-stops that crush Performance.

See how Fabrico captures this automatically on your lines — explore OEE for manufacturing or book a demo.

Related reading

Frequently asked questions

Is manual tracking useless?

No, but it under-reports short stops and misclassifies causes.

What does automatic need?

A machine signal or sensor to detect stops.

Why do micro-stops matter?

They are often the single largest hidden loss.

Best approach?

Automatic detection plus operator-entered reasons.

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