An integration model of factors influencing the success of management consulting (MC) projects in proposed. The model posits that client organisational characteristics, competence of consultants, and consultation mode will be correlated with MC success, measured by efficiency and effectiveness of the projects. Nine hypotheses are proposed and empirically tested using data collected from the client staffs of 119 MC projects in 60 Korean firms. Analyses of the data using the multiple regression technique moderately supports the study's model. The major findings are that both client organisational characteristics (e.g., staff's commitment, and functional heterogeneity of client staffs) and consultation mode (e.g., specifics of goals, procedural standard, methodological compatibility) have a significant impact on the success of MC, particularly on its effectiveness. However, it was found that the competence of consultants is not significantly correlated with MC success. These findings are discussed and several implications are suggested.