Thank you for all replies posted so far.
All I need to know really is a step by step description of speed scheduling (which speeds are used, RAS/mach changeover, at what point and why...) thru from initial climb to TOC, and from TOD to start of the approach. The first explanation from Alatriste seems to make sense, just angling for some explanations from a different perspective. Come on you airline guys, just LIST what you do!