With organizations increasingly opting to implement ERP system packages, there is an increasing need to understand what factors facilitate or inhibit the implementation process. In doing so, the paper views the implementation from user-based innovation process perspective and develops models to predict the influence of various organizational factors on the effort associated with various stages of the innovation process. The organizational factors being considered for the study include structural factors that is, centralization, formalization, specialization, and functional differentiation, and contextual factors that is, organizational absorptive capacity and organizational publicness.