Awroncaman:
As pilots we musthave that information so that we know whether we can stay with the SID or needto take up the emergency turn/contingency procedure.
It either needs to come from the manuals (which it has done in the aircraft Ihave flown), or be provided in the form of performance analyses from commercialcompanies or airline performance planning departments.
Scheduled performance, be it JAR 25 or FAR 25, enables one to define theability of the aircraft throughout all stages of flight, in black and white andnumerical terms. In a court of law a lawyer could ask the operator todemonstrate the complete performance calculation. A wet finger in the wind orblind hope is not what the travelling public want to hear!
I presume that means you agree with my Post #30 to you.