Remember that solutions evolve: The initial preventive action will be based on the evidence at the time and previous experience. If it appears to address the cause then well and good.
But if the same or a similar defect reoccurs prompting further investigation, so might the preventive action evolve – sometimes into something quite different from the initial fix. If the preventive action evolves correctly it corrects the problem without causing another one.
– Flight Safety Australia Magazine, May-June 2010, “Don’t play it again, Sam.” by Roger Alder
When I read this today (the author was talking about aircraft maintenance), I was reminded of my efforts at fixing WMI issues.
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