Ed, there is no better way to describe the primary situation facing German production facilities in late 1944 other than "logistical problems". To satisfy your request though, I offer the following from page 1152, reel 12, frame 6580 of the Milch notes - a verbatim translation of the stenographic notes of the 9 Dec 1944 Rüstungsstab meeting:
"Dr Holzknecht reports on the expected slump in the output of 109, 190 and 152 as a result of transport difficulties due to insufficient urgency. Decision by HDL Saur as to whether program breaks can be accepted or whether transportation can be brought forward at the expense of other production."
So yes, "logistical problems" would certainly be a proper term to describe the myriad problems facing German factories and subcontractors in late 1944.
As an aside - an important one - Andrey's response prompted me to look back through the entirety of R3/1926 and I think I may have found the answer to the question of why those Nov/Dec 44 numbers are so far removed from reality. It's complicated, and required cross-referencing a number of other documents, but the short version is this: Andrey's proposal that they may represent PROJECTED completion numbers may be correct, based on other information in the 9 Nov 1944 Rüstungs-Notprogramm and a separate document found in T77-0032 covering projected fuel use requirements for 1945. And if it is correct, whomever put that chart together on page 88 of R3/1926 should be slapped.

I'm working on a post which ties all this together... more soon.
Cheers,
Lynn