4.2 Multiple mode of operation

SESAR JU has to date published one SESAR Solution related to the multiple mode of operation, with further research to expand the concept ongoing. Yet, at the time of publication of this document, no operational implementation of this concept exists, and subsequently operational experience is so far limited to validation and trial activities (performed within the SESAR JU framework as well as individually by ATS providers). Nevertheless, implementation plans comprising the multiple mode of operation exist among providers within the EASA Members States; EASA considers that there is already sufficient information and data available to provide support and guidance to facilitate its safe implementation, as well as to provide a basis for further development. The overarching recommendation with regard to multiple mode of operation is that it is to be used only when the operational circumstances so allow and when certainty exists that workload and complexity can be managed. It is the responsibility of the ATS provider to define the suitable operational circumstances, which require careful considerations, as well as to provide sufficient evidence for an acceptable level of safety (as is always the case). Some further aspects to consider for the implementation of multiple mode of operation are provided in the sections below. In addition, more detailed operational, procedural and technical considerations are outlined in Section 5.13 and change-management-related considerations are outlined throughout Chapter 6 (Section 6.2.1 for safety assessment considerations, Section 6.3.2 for human factors considerations and Section 6.7 for contingency planning/procedures considerations).