Current theories of large-scale organizational change (LSOC) were examined to develop an integrated framework for investigating the effects of LSOC on organizational performance. This framework was tested using survey data, financial measures, and customer service ratings collected in twenty-six different business units in the same organization. Results showed that organizations experiencing LSOC (1) performed better financially than organizations that experienced incremental change or no change/negative change, and (2) demonstrated significantly greater improvement in managerial competence. The implications of these results are discussed.In recent years, large-scale organizational change (LSOC) processes have become an increasingly popular area of inquiry in the fields of organizational behavior and organization development (for example, ). Despite the prevalence of such investigations, relatively little is understood or agreed on about the nature and measurement of LSOC (Ledford, Mohrman, Mohrman, and Lawler, 1989;Porras and Robertson, 1992;Robertson, Roberts, and Porras, 1993). The myriad different yet related names and definitions of largescale change processes-such as transformational change, revolutionary change, major change, fundamental change, and radical change-evidence this lack of agreement. As a result, efforts to integrate various change theories and processes, although relatively infrequent, have become increasingly desirable (Van de Ven and Poole, 1995). Therefore, in order to formulate a more comprehensive model for examining the phenomenon of change, more emphasis on the integration of established approaches seems warranted. To this end, this article presents and ultimately tests a new integrated model of large-scale