An enterprise will have requirements to implement best practices, systems and new releases over the ERP system's life cycle. If the enterprise phased the implementation, then it was planned that some of the best practices and some of the systems will be implemented after the ERP system is implemented. An enterprise will have requirements for learning skillsets over the ERP systems' life cycle.
New hires are another never ending requirement for learning new skillsets.
An enterprise will have requirements for maintaining systems over the ERP system's life cycle. Every time a manager or knowledge worker wants new information the decision support systems will have to be maintained. Every time pricing changes, or every time there is a new contract with a customer or supplier, or every there is a new labor agreement, or every time there is a new benefit plan the transaction processing systems will have to be maintained. Life Cycle Responsibilities Satisfying an enterprise's life cycle requirements can be the responsibility of the enterprise's managers and knowledge workers or can be the responsibility of an external resource. Life Cycle Service Requirements Life cycle requirements assigned to external resources will define an enterprise's requirements for life cycle services.