ERP becomes one of the important enterprise IT applications which enables the standard business process and integrated database. ERP implementation project is a complex, cumbersome and expensive initiative and change management is regarded as one of the most important factors for the successful ERP implementation. Change management includes stakeholder management, communication, end-user education and training and after go-live operation support. End user education and training is considered as the most resource requiring work stream which proceeds with migration data and system validation. This paper presents an empirical framework for the estimation of the dedicated resources of the project which is based on the resource requirement of user-training and system validation of ERP systems. Two user participation frameworks are defined–two-tier of users and three-tier of users. For each framework, a rule is proposed for calculation FTE of ERP implementation project. Future plans include for the verification of this empirical framework by an investigation of the ERP project case studies and is expected to do further research for the staff sizing and organization operation types to manage change management after ERP deployment.