nigelh, if I read it properly I think Crab is talking about the fact that a military aircraft is designed against an agreed predicted usage spectrum. At various points this spectrum is revisited with the experience of how the airframe is actually being used. It is rarely about "military manouevres" more about the relative percentage of time the airframe spends in particular flight conditions, weights, cycles. Everything in the spectrum should be within the RFM/RTS.