Errata

I have detected the following minor errors in my article, “Operating Characteristics of Opportunistic Replacement and Inspection Policies," Management Science, Vol. 10, No. 1 (October 1963), pp. 85–98, that might possibly cause some confusion. The first five “t's” appearing in the Preliminaries (p. 87), the first five “t's” in the Preliminaries (p. 88) and the first five “t's” in the Preliminaries (p. 90) should all be “X's”.