Graduate Thesis Or Dissertation
 

Sampling inspection plans for attributes derived for the lumber industry

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/th83m207j

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  • The purpose of this study was to derive a set of sampling plans to be used by the Western Wood Products Association for the reinspection of shipped lumber. Reinspection of a shipment of lumber occurs when a claim of grade is made by the buyer. Each sampling plan is derived in such a way so that its operating characteristic curve would pass through two preassigned points. These two points reflect the risks involved in sampling. The Hypergeometric Probability Distribution was used to derive the sampling plans when the lot size was 100 units. The Binomial Probability Distribution was used to derive the sampling plans when the lot size was 2,000 units. The Poisson Probability Distribution was used to derive the sampling plans when the lot size was at least 5,000 units. The sampling plans derived in this study are acceptance plans to be used in attribute inspection.
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