{"product_id":"quality-control-of-non-normal-moisture-content-in-kiln-dry-lumber-von-catalin-ristea","title":"Quality control of non-normal moisture content in kiln-dry lumber","description":"\u003cp\u003eDrying lumber with little variation in its target  moisture content leads to increased cost savings  and  reduced wet claims. The variability of moisture  content is  typically monitored using quality control charts,  which graph process  central tendency (average) and process dispersion  (standard deviation) over time. The usual assumption  in constructing  and using these charts is that the  moisture content follows a normal  (Gaussian) statistical distribution. However, due to  the  nature of the kiln-drying process, the resulting  lumber  moisture content distribution is often left-bounded  and  asymmetrical, which  is characteristic of a log-normal distribution. In  these cases, the normality assumption can lead to  errors such  as false out-of-control signals. This book outlines  graphical and analytical goodness-of-fit methods for  assessing the  (non)normality of lumber  moisture content data, discusses  appropriate monitoring parameters for process central  tendency and  dispersion, and presents practical procedures for  calculating the centerline and upper\/lower control  limits of log-normal  control charts.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838321011\"\u003e\u003ch3\u003ePractical procedures for determining the distribution of moisture content and constructing specialized  control charts for log-normal data\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783838321011","offer_id":39498912759901,"sku":"9783838321011","price":49.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/7eea4015-4c2c-4759-a293-50fe51467e85.jpg?v=1769666771","url":"https:\/\/shop.autorenwelt.de\/products\/quality-control-of-non-normal-moisture-content-in-kiln-dry-lumber-von-catalin-ristea","provider":"Autorenwelt Shop","version":"1.0","type":"link"}