missed hole

missed hole

[′mist ′hōl]
(engineering)
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References in periodicals archive ?
Yesterday, prison officer Brian Thompson said that governors had decided not to search the exercise areas at night and so missed holes that the killers had cut in the wire before climbing across a roof and into the prison yard.
First, the machines usually run unattended, so tool breakage is harder to detect; they also run fast - often hundreds of parts and thousands of operations an hour - so a broken tool can, in a matter of seconds, cause a chain reaction of other broken tools, missed holes, scrapped parts and downtime that can make the cost of replacing the original broken tool seem inconsequential by comparison.