Some researchers have studied the critical success factors in ERP implementations, out of which sustained management support is cited as the most one. Up to this moment, there is not enough research on the management and operationalization of critical success factors within ERP implementation projects. This paper presents a proposal for monitoring sustained management support in ERP implementations. In order to develop a set of metrics for such a monitoring task, we have used the goals/questions/metrics approach. As a result, we propose a GQM preliminary plan with different metrics to monitor and control sustained management support while implementing an ERP system