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Calculating Job Duration
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Zarek Kree
Lunatic Legion Holdings
#1 - 2017-03-17 03:39:43 UTC
I can't seem to figure out how to correctly compute job duration for manufacturing on my spreadsheet. Using an Ion Thruster blueprint as an example, the base build speed is 2:00 (2 min). On the manufacturing screen, my job duration modifiers show as Blueprint TE: -20%, Skills and Implants: -31.7%, and engineering complex bonus: -20%. The job duration that it predicts is 1:06. That's a 45% reduction. However, there's no permutation of the base time and modifiers that gets me a 1:06 build time that I can find. Every computational method I use has me significantly lower than that. Can anyone point me to the correct formula?
Zarek Kree
Lunatic Legion Holdings
#2 - 2017-03-22 19:46:54 UTC
Just wanted to give this a bump. I've used this document for most of my other formulas, but I can't seem to make it work for job duration. Other 3rd party tools are making the proper calculations so I know I'm just missing something.
Tyrion ArcheRift
Netflix and Kill
Digital Vendetta
#3 - 2017-03-24 05:21:15 UTC
it could be that the "Skills and Implants" modifier is going of one of the other modifiers rather than just having everything added together, so it reads as -31.7% of 20% or 40% (quick math suggests it's most likely going off of a 20% value)
Aurum Prime
Aurum Prime Industries
#4 - 2017-04-06 09:22:17 UTC
Zarek Kree wrote:
I can't seem to figure out how to correctly compute job duration for manufacturing on my spreadsheet. Using an Ion Thruster blueprint as an example, the base build speed is 2:00 (2 min). On the manufacturing screen, my job duration modifiers show as Blueprint TE: -20%, Skills and Implants: -31.7%, and engineering complex bonus: -20%. The job duration that it predicts is 1:06. That's a 45% reduction. However, there's no permutation of the base time and modifiers that gets me a 1:06 build time that I can find. Every computational method I use has me significantly lower than that. Can anyone point me to the correct formula?


In case you still haven't figured out where is the mistake:

Ion Thruster BP base build speed is 0:02:30. BP shows 0:02:00 because TE was already applied.
So 120 sec * 0.693 * 0.8 = 66.5 sec.
Zarek Kree
Lunatic Legion Holdings
#5 - 2017-04-06 13:26:48 UTC
Aurum Prime wrote:
Zarek Kree wrote:
I can't seem to figure out how to correctly compute job duration for manufacturing on my spreadsheet. Using an Ion Thruster blueprint as an example, the base build speed is 2:00 (2 min). On the manufacturing screen, my job duration modifiers show as Blueprint TE: -20%, Skills and Implants: -31.7%, and engineering complex bonus: -20%. The job duration that it predicts is 1:06. That's a 45% reduction. However, there's no permutation of the base time and modifiers that gets me a 1:06 build time that I can find. Every computational method I use has me significantly lower than that. Can anyone point me to the correct formula?


In case you still haven't figured out where is the mistake:

Ion Thruster BP base build speed is 0:02:30. BP shows 0:02:00 because TE was already applied.
So 120 sec * 0.693 * 0.8 = 66.5 sec.


No, I hadn't figured that out. I pulled the build speed off of the item description in-game. It never occurred to me that it would apply the TE outside of the manufacturing tab. I can't believe I didn't think to confirm the data out of game. Seems pretty obvious now.

Much thanks!