Sporadic Losses vs Chronic Losses
History doesn’t always shows future
Repetitive or single and solitary?
Individually predictable or incidental?
Similar or different?
Inevitable or accidental?
– vital for your prevention policy –
Chronic Losses – Sporadic Losses
(at “weak components”)
1/3 of all Loss Events *
2/3 of all Loss Events *
|are being triggered
|by several different faults
working possibly just occasionally at the same moment
being frequently non-technical
to be defined by “Basic Risk Factor“
|are to be controlled
by eliminating these Basic Risk Factors
* These proportions are frequently to be found with plant defects in production plants.
The relation of the number of chronic to the number of sporadic defects depends on the following factors:
- With respect to the kinds of defects triggered by plant deterioration: When a plant handles much abrasive material (i.e. ores, sand, coal etc.) those short-life components in direct contact with this abrasive material will rather frequently wear out and thus push up the number of chronic defects. – Only these defects with their respective kinds of defects must be accepted.
- All other kinds of defects (i.e. in-admissable defects, all interruptions and process failures (including those ones that are caused by admissable and in-admissable defects); Accidents, damage to the environment and the company’s image; quality defects and costumer’s complaints) might repetitively occur shortly after putting into operation of new plant or a new operation (“infant mortality”). However, within the very first years of operation their causes should have been eliminated; and then the proportion of chronic quality defects should definitely be less than a third.
How is the situation in your organization?
If you want to find out about the proportion of Chronic and Sporadic Losses, check the structure of quality defects.