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Abstract
Ordinal rating systems are commonly employed to evaluate biodeterioration of wood exposed outdoors over long periods of time. The purpose of these ratings is to compare the durability of test systems to nondurable wood products or known durable wood products. There are many reasons why these systems have evolved as the chosen method of evaluation, including having an overall evaluation that incorporates several characteristics thought to correlate with some “failure,” balancing bias and variability because of multiple raters and simplifying calculation and interpretation. Appropriate analysis of the ordinal ratings is needed to accomplish this goal. We will briefly review the standards and associated methods and models currently in use, as well as several proposed analysis methods in relation to an example FPL data set.
Citation
Lebow, Patricia; Kirker, Grant. 2014. Rate My Stake: Interpretation of Ordinal Stake Ratings. Proceedings of the One Hundred Eighth Annual Meeting of the American Wood Protection Association, Nashville, TN, April 29-May 2, 2012. Birmingham, AL. 108: 2014; pp 156-164.
