It isn't that simple. I have a good on the history of the Niebelungenwerk from Austria (where the plant was) and in 1942 the machinery was not installed and full capacity was simply unreachable until 1944. They were still building the factory, which is why given that they were partially operational they were tasked with working on a prototype and involved in repair work for damaged existing Panzers or upgrading older ones. In 1943 production was climbing due to more of the plant being operational, but having it work on the Tiger prototypes and then converting them to something else useful when the Porsche version didn't get accepted was a very reasonable use of the facility at the time.
https://translate.google.com/transl...wikipedia.org/wiki/Nibelungenwerk&prev=search
Well lets brake this down. According to the link NI-WERK had 9 halls with maximum capability of 320 tanks per month or 3840 tanks per year. Put another way each of 9 halls can produce 35-36 tanks per hall per month, with two of the halls to build larger tanks.. Initial production @ NI-WERK- in first 1/2 of 1942- was reported at 2-8 * Pz-IV per month; for five months plus one Porsche Tiger prototype each month.
After that the planned Pz-IV production increase to 32 per month by November 1942, but only 186* Pz-IV were actually built due to ongoing problems with the prototype. Add to this the 785 Pz-IV from Krupp-Gruson & Vomag.I wonder what the monthly out put would be with out Prototype effort. At least double? triple?
Looks like the 90 Elephants occupied NI-WERK in the spring of 1943, preventing major Pz-IV production increase, however the total Pz-IV production @ NI-WERK still reached 1370 or 114 per month. Krupp-Gruson & Vomag added another 137 per month for a total of 3013 for 1943.Without Elephants that could have reach 156 per month or 3516 for 1943.
In 1944 the NI-WERK monthly production reached 237 for a total of 2845 , with Krupp-Gruson & Vomag only adding 23 per month -the total was 3125 for the year. Through out 1944 NI-WERK was also building the Jagd-Tiger prototype. This may have taken up one hall out of 9 reducing potential out put by 30 Pz-IV per month.
In 1945 the monthly out put was maybe 128 Pz-IV & 26 Jagd-Tiger per month. Combined that could have allowed 276 Pz-IV per year.