You have observed how bar codes are used on student ID cards, coupons, sales receipts, etc. Suggest one or more methods of using bar codes in Poka-Yoke Mistake Proofing in the following situations:

A work station in a production cell has two drill presses. They are identical except for the size of the drill bit. Parts are processed one at a time, and all require one hole to be drilled. The parts arrive in a tray that also includes a production order sheet that has a bar code printed on it for inventory purposes. Most parts require a small hole, but about 20% require the larger hole instead. The operator sometimes drills the wrong size hole in parts.

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