If the
formula provided by
Argandios works like intended, let's give it a try...
For simplicity we'll take 1936 Infantry, 5 fields of level 4 to be researched, no double/extra field, no pre-/post date research, it is year 1936 in which we research this tech:
Code:
T = 100*D / [1.65*Nr + {(100+Er)*3*(6.1+Tl)} / {(100-Em)*(4+2*Dr)*MF*B}]
T = research Time of that part of the research.
D = Double time, 2 if it is one of those parts which require of double time (or double effort, or whatever you want to call it), 1 if it is not.
Nr = Number of rocket or nuclear research facilities you have, if that part of the research is related to either rocket or nuclear science projects, if that part is not related with any of those, this number is 0.
Er = Extra research efficiency due to industrial research for tabualte and computing machines, if any.
Tl = Research team level.
Em = Extra research efficiency due to any minister, if any.
Dr = Dificulty level of that part of the research.
MF = Main Field research, 1 if it is NOT a Main Field research for the team, 0.5 if it is.
B = Blueprints, 1 if if u do NOT have a blueprint, 0.5 if you do have a blueprint.
1) Level 9 tech team with 0 matched fields, no blueprint, same year as tech
Let's fill out the variables for your level 9 tech team with no matches:
D: 1 (no double time)
1.65*Nr: irrelevant
100+Er... replaced with 53: we need to adjust this, because in DH, misc.txt line 955, the research modifier was lowered from 1 to 0.4, so we'll change 100 to 40 and for Er (extra research ability) we'll assume all computer techs upto 1936 to be researched which adds up to +13, altogether 53... or the easiest way, just replace 100+Er with research speed as shown in the tech overview (right coloumn, bottom), in this case it would show 53%.
Tl: 9
Em: 0
Dr: 4 (same for all 5 tech fields)
Mf: 1 (no matched fields)
B: 1 (no blueprint)
This gives us the following:
Code:
T = 100*D / [1.65*Nr + {(100+Er)*3*(6.1+Tl)} / {(100-Em)*(4+2*Dr)*MF*B}]
T = 100*1 / [1.65*0 + { (53) *3*(6.1+9 )} / {( 100 )*(4+2*4 )*1 *1}]
T = 100 / [ 2400.9 / 1200 ]
T = 49.98 => rounded up: 50
One tech field should take 50 days, we have 5 fields, for all the same conditions, so we can simply say:
50 * 5 = 250 days it should take a L9 tech team to research Inf 1936 in 1936 with no matches and no blueprint.
2) Level 6 tech team with all tech fields matched, no blue print, same year as tech
Code:
T = 100*D / [1.65*Nr + {(100+Er)*3*(6.1+Tl)} / {(100-Em)*(4+2*Dr)*MF*B}]
T = 100*1 / [1.65*0 + { (53) *3*(6.1+6 )} / {( 100 )*(4+2*4 )*0.5 *1}]
T = 100 / [ 1923.9 / 600 ]
T = 31.19 => rounded up: 32
32 * 5 = 160 days it should take a level 6 team with all fields matched to research Inf 1936 in 1936, no blueprints.
Comments:
I haven't tested the formula very much, I hadn't the time since I saw it having been posted. So, I can't say wether it is a correct one.
Due to the much lowered research modifier in DH in comparison to HoI2 (from 1 to 0.4) research takes generally quite much longer... this was also the reason why the old
approach was leading to wrong results. In other mods this has been taken even further: Edge of Darkness has lowered the research modifier to 0.3, same for World in Flames 2. This means that in relative comparison automatically various things have been strengthened or made much more important:
# computer techs, ministers raising the research speed
# blue prints (additionally EoD and WiF2 raise the bonus blue prints give from 2 to 2.5 which results in a changed multiplier from 0.5 to 0.4, lower=better)
# matching fields (so the old rule of thumbs don't work anylonger as you can quite clearly see from above calculations)
Even if the new formula doesn't hit it 100% correct, we have all noticed the longer research times in comparison to HoI2.
My experience: I can easily research 3 or 4 old techs with blueprints and well matched fields in the time it takes to research one juicy important tech of the present year without blueprints. Some techs are worth it, some not. Due to the lengthier research times, now more fall into the category: not worth research asap IF you have still interesting old techs available.