I think I see what alf5071h is driving at and I agree.
Looking closely at the information provided for flight with unreliable instruments indicates ball park figures are exactly that albeit a very handy lifeline to offer in the sim.
Could it be that the habit of sim instructors to load to a single convenient weight gives PWR + ATT =perf an undue simplicity in jet transport operations?
I liken this environmental capture, if you aren't offended by the term, to 75/76 sim instructors advancing the ease of elegant tracking on approach by placing the white line over the magenta. It only works in sims because they are frozen in all perpetuity regarding mag variation mapping. Sadly the magnetic pole continues to move for the rest of us mortals.
I'm in the sim every day - it works great in the sim - therefore it must work in real life. Sure, get them comfy and with something to grasp onto but get speed control rapidly into the loop and please, please start significantly varying the weights to re enforce this.
Come on folks, haven't we all been there? 'Standard fuel, trim is five on the wheel, the engines are running and I'm putting you at the end of the runway.'
Yep, a huge number of you are now running details from a printed 'scenario' but it seems pressure to get that beast up on the jacks leads to some, err, simplifying.
Regards
Rob
PS If this isn't anything resembling what alf5071h was trying to suggest please ignore everything after, 'I think.'