Reducing Wiring Errors by Patchboard Design

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Abstract
The selection of optimal patterning and labeling schemes for patchboards is not as simple as it may seem. Only two of six experimental schemes were an improvement over a standard scheme that was used for comparison. The use of letters above and below each hole in a board substantially reduced one of the most common types of wiring error—the placing of a pin one hole to the left or right of the position in which it should have been placed. This lettered board produced only one-half of the errors made on the standard board, was wired in 8 per cent less time and was highly preferred by the technicians who served as experimental subjects.

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