During the last decade, modularity has attracted the attention of numerous management scholars, and both theoretical and empirical studies on this topic have flourished. However, this broad-based appeal has generated some controversies and ambiguities on how modularity should be defined, measured and used in managerially meaningful ways. This paper reviews the concept of modularity as a design principle of complex systems in management studies. Applying this criterion, 125 studies were selected and classified, grouped according to their prevalent unit of analysis: products, production systems and organizations. Although all these studies are based on Simon's seminal work on the hierarchical and nearly decomposable nature of complex systems (Simon, H.A. (1962). The architecture of complexity. Proceedings of the American Philosophical Society, 106, 467-482), this paper shows that they offer different definitions, measures and applications of the modularity concept. This review reveals the implicit structure of meanings underlying this literature and emphasizes that ambiguity in definitions and measures impedes rigorous empirical studies capable of understanding the relationship between modularity in product, in production and in organization design. Cautions and directions for future research are discussed.i jmr_260 259..283

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New competitive and environmental challenges have fostered renewed attention towards organizational design. This scenario calls for a significant return to organizational design studies that embrace a holistic approach, especially those focusing on the simultaneous interaction of multiple design elements. Organizational life cycle (OLC) models provide a fitting response to this call. In this paper, we review the organizational design characteristics of five seminal OLC models. We show that according to these OLC models, growth in size—which is described as unavoidable—generates business issues that firms are forced to solve by adopting only one possible organizational configuration, here following a deterministic organizational approach. We challenge this approach and propose conceiving of OLC as an evolutionary process, which calls for a variety of equifinal organizational solutions. We conclude by proposing future research avenues.