Enterprise Architecture (EA)

Enterprise Architecture (EA) is a powerful holistic method for managing change and alignment of the operations, the systems and the technologies with business and customer needs in an enterprise – a collection of organisations and services working together to achieve a set of common goals.

The Enterprise Architecture structures the description of all the facets of the enterprise (goals, business organisation, operations, systems and technologies) as they are now (the “as is” situation) and as they will have to be (the “to be” situation) to achieve the enterprise business goals and performance objectives. It also builds a common vision of the path to the change.  It provides a better understanding of the various elements of an enterprise and their connections, of change management plans and also a knowledge base and a valuation system useable in a number of contexts.


In the SESAR Programme, a European ATM Enterprise Architecture (EAEA) is developed to define the architecture of the European ATM as it is now and as it will be for each of the SESAR story board steps:

  • step 1 (time based operations, e.g. circa 2016);
  • step 2 (trajectory based operation e.g. up to 2020;
  • step 3 (performance based operations e.g. up to 2025)

as well as the roadmap for the operational, the technical and the institutional changes in support to the ATM Master Plan.

EAEA will be used as context and reference for all the SESAR development activities and deliverables. It will support programme decision making and enable the necessary alignment and consistency activities of this programme of more than 200 projects and involving 2000 persons.  It is an essential tool to support the transition of the European ATM system to the Service Oriented Approach (SOA) and to System Wide Information Management (SWIM). It also provides a solid basis for global interoperability activities and alignment.

EAEA will be a very important tool that will provide credible information about the status of research & development to all European ATM stakeholders. After the SESAR development phase, EAEA baselines will support them in the process of making well informed decisions about the planning and monitoring of their deployment activities.