In a recent article (Salveson, M. E. 1955. The assembly line balancing problem. J. Indust. Engrg. VI 18-25.), M. E. Salveson discussed various problems concerned with setting up production lines. The purpose of the present paper is to set forth an enumeration procedure for solving one of these problems. The reader is referred to Salveson's article for a detailed discussion of the circumstances in which this problem arises and for remarks concerning the assumptions in its statement.