An enterprise exists to fulfil a defined mission. If there is no mission, there is no need for the enterprise.
An enterprises mission is fulfilled by processes that are purposefully designed around mission. If there are no processes, there is no way to fulfil the mission.
An enterprises process is a series of work activities that produce products and services for customers. If there are no work activities then there a no products and services.
An enterprises customers receive product and services through the interactions of people and technology. Without people and technology, there are no customers.