The objective of this paper is to present a conceptual model of CSF (Critical Success Factor) relationships for ERP (Enterprise Resource Planning) project implementations. This model progresses the traditional theoretical concepts underpinning CSFs, from simple classifications and CSF lists, to providing an insight into the interconnectedness existing between CSFs for ERP project implementations. While the model is developed using a collective case study research approach, it can be validated and tested by further research. In its current form the model emerges from a within-case and cross-case analysis of the presence/absence of certain CSFs, concentrating on the complex relationships identified between these CSFs, within the four interpretivist cases studied. Indeed, following the analysis of the cases studied, it can be argued that the Conceptual Model of CSF Relationships presented in this paper moves to raise the level of managerial awareness (in particular) of the importance of the interconnectedness of CSFs for ERP project implementations.