PurposePast studies of lean have failed to sufficiently address the importance of social factors for successful lean implementations. This paper aims to broaden and deepen the understanding of lean as a socio-technical paradigm by conceptualizing lean implementation as an organizational change process.Design/methodology/approachThis study draws on the organizational sense-making literature to conceptualize and validate lean implementation as an organizational change process that necessitates a focus on the ability of organizational actors to construct a shared meaning of lean. This study posit that this shared understanding shapes the collective behaviour and attitudes of people towards a future desired organizational state such as a successful implementation of lean. Survey data were collected from various manufacturing and services firms to test the hypothesis derived from literature using a structural equation modelling approach.FindingsThe mutual social interactions of organizational actors contribute to an enabling lean organizational attitude that has a dominant effect on the lean practices of employee involvement, internal technical practices, supplier and customer management. This study also established boundary conditions for these relationships by identifying firm size as a moderating variable.Research limitations/implicationsThe findings establish a supportive organizational attitude as an antecedent for lean implementation, which goes beyond the current socio-technical characterization of lean management. This conceptualization draws the attention of researchers and practitioners towards the critical role of the cooperative behaviours of organizational actors in lean implementations.Originality/valueThe statistical results add a novel perspective to the discourse on the social dimension of lean implementation by conceptualizing and validating lean management as a combination of organizational attitude and the process facilitators comprising of employee empowerment, internal technical practices, supplier and customer management.