Which system which source? Note RISES (from your posted information). Rises not constant.Can't be more ambiguous than that. I read it as maximum fuel pressure meaning the higher of those two numbers.
That VW document pretty much described it too a tee, they actually know how their injectors work.
They do not want others to know all about it though.
++++++++++++++++
If the document had:
Pressure rise by RPM for the tandem Pump
Fill rate for the unit injector body by crank degree and supply pressure
Injection Pressure rise for Moderate acceleration
Injection Pressure rise for WOT
etc.
We might learn more
++++++++++++++++
We find out that a 100HP unit injector body has a limit of injection possible no matter what the tip. This injector body has restrictors and fill orfices to which we have no source of information. So you may look at the document and draw conclusions, but from my standpoint they have given limited information. The information given may lead you to make assumptions that are misleading.
eddif