Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (495 KB)

Title: Statistical framework for comparing lumber sorting procedures

Author: Verrill, Steve V.; Johnson, Richard A.; Evans, James W.;

Date: 2009

Source: Research Paper FPL-RP-651

Publication Series: Research Paper (RP)


In this paper, we take a preliminary look at techniques for comparing sorts that yield grades of lumber. We propose methodology that takes into account differences in grade prices and the costs associated with misgrading. We focus on two- and three-category sorts, but our results could be readily extended. We provide web links to sample FORTRAN implementations of this methodology for the case in which the strength predictor and strength have a bivariate normal distribution and the load distribution is also normally distributed. We indicate how these approaches would have to be modified for other predictor, strength, and load distributions.

Keywords: Lumber, grading, mathematical models, computer simulation, lumber grading, correlation estimation, comparing sorting procedures, classification

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Verrill, Steve V.; Johnson, Richard A.; Evans, James W. 2009. Statistical framework for comparing lumber sorting procedures. Research paper FPL-RP-651. Madison, WI: U.S.Department of Agriculture, Forest Service, Forest Products Laboratory. 17 p.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.