Implementation of Enterprise Resource Planning (ERP) solutions, which involve both technical and social uncertainties, is in practice a highly uncertain, risky endeavour. Traditional ERP practices address implementation of ERP as a static process; such practices focus on structure, not on ERP as something that will meet the needs of a changing organization. As a result, many relevant uncertainties that cannot be predefined are not easily accommodated. Options theory, which addresses uncertainties over time, resolves uncertainties in changing environments that cannot be predefined. In this paper, we propose an options perspective on the ERP implementation process with a focus on uncertainty. This perspective takes into consideration the often-changing nature of the companies that undertake ERP implementations. In addition, we present a practical example that demonstrates how to use options theory in context, enabling active management when implementing ERP. By actively managing ERP implementation, management can improve the flexibility of ERP implementation and can take appropriate actions to respond to the changing ERP implementation environment, to achieve more a successful ERP implementation that better meets the needs of the organization.