One-and two-dimensional iterative arrays of identical cells are becoming more important in the design of digital systems using large-scale integrated circuits because of the advantages that they provide in design, fabrication, and testing. Since arrays containing hundreds or thousands of gates on one chip are now considered possible, the task of finding procedures for the testing of such arrays from their edges is of concern to both the users and the manufactures. The iterative nature of cellular arrays sometimes makes it possible to derive test schedules of reasonable length.