Project Timeline

Phase 1

Phase 1 was a feasibility study following proposals from FIRST & FINAL™ airlines. It was conducted in 2007 with input from IATA, AIA, and key airlines. The study determined that while Simplified Interline Settlement (SIS) is feasible, more evaluation would be required for modifications to the ICH and AIA processes. Additionally, a timeline for implementation would need to be defined.

Phase 2

Phase 2 is a more detailed study and documentation of the requirements, costs, priorities, and timeframes of SIS. Unlike Phase 1, this phase relies on the input from a number of airline experts.

  • January 2008 - Phase 2 kicked off with a meeting of the SIS Steering Group in which the scope and deliverables of the project were agreed on and working groups were formed.
  • February - May - Working groups (WGs) and sub-groups met to create the functional requirements. Meetings for most groups were held monthly; between the meetings members went back to their airlines to research additional information or investigate potential options.
  • June - The requirements from all working groups were combined. The WGs and SG ensured that the overall requirements were consistent with their vision. Only the E-Invoicing WG will continue to meet and define e-invoicing codes and standards  through November.
  • July - Potential vendors received the WGs' requirements in a Request For Information (RFI) and will provide an estimate of feasibility, development cost and time.
  • August - The vendors’ responses will be combined with the requirements in order to create a business case.
  • September - The SIS roll-out plan will be presented to the Revenue Accounting community at its annual meeting. Break-out sessions will be held for carriers who want more detailed information. Later in September, the plan will be presented to the IATA Financial Committee (FinCom) for approval.


Phase 3

After the IATA Board of Governors endorses the results of Phase 2 at the December meeting, implementation of SIS will begin.

The implementation timeframe for Phase 3 is not yet known - this will be an output of Phase 2.