1. Purpose of the gate
Program launch decides whether the business will commit to an airborne equipment program at all. The question is not only whether there is a market, but whether the business case honestly carries the cost of doing the work to an assurance level, of liaison with an authority, of environmental qualification, and of support and obsolescence management for a fleet that may fly for decades.
Airborne programs fail commercially more often from underestimated assurance and support costs than from technical problems. A business case that prices only design and production will be overrun once the levels are known. Reviewers therefore look for a realistic view of the likely assurance levels, even before the safety assessment fixes them, and for the long tail of support that customers will expect.
Reviewers also test whether the business is ready to act as, or alongside, an applicant. Holding a technical standard order authorisation brings obligations for production, problem reporting and continued airworthiness that last as long as the equipment flies. If the business does not want those obligations, the case should assume an integrator will hold the approval, and the price and contract should reflect who carries which duties.
Passing this gate funds the aircraft and system requirements stage. It does not commit the program to a certification route or to assurance levels; those come at the next gate.
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