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 (66 KB bytes)

Title: Value of Defect Information in Automated Hardwood Edger and Trimmer Systems

Author: Regalado, Carmen; Kline, D. Earl; Araman, Philip A.;

Date: 1992

Source: Forest Products Journal. 42(3): 29-34.

Publication Series: Miscellaneous Publication

Description: Due to the limited capability of board defect scanners, not all defect information required to make the best edging and trimming decision can be scanned for use in an automated system. The objective of the study presented in this paper was to evaluate the lumber value obtainable from edging and trimming optimization using varying levels of defect information as input. In an earlier study, a computer-based procedure for estimating optimum edging and trimming solutions was developed. The same procedure was used in the optimization experiments in this study. Instead of complete defect data that the procedure ideally requires, a combination of selected defect types was used for each optimization experiment. The sample for the study consisted of 120 unedged/untrimmed red oak boards collected from three hardwood mills. The value recovery calculated from the different defect information categories is presented and compared to the lumber values calculated from complete board defect data, as well as to the lumber values actually obtained in the sawmill from the same boards. The results showed that it is possible to obtain lumber values higher than actual sawmill output from a computer-based edging and trimming optimization procedure even if not all board defects are considered.

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.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Regalado, Carmen; Kline, D. Earl; Araman, Philip A. 1992. Value of Defect Information in Automated Hardwood Edger and Trimmer Systems. Forest Products Journal. 42(3): 29-34.


 [ 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.