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Tech 2 BPC cost
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Skadi Asgaurd
Fluffy Carebears
#1 - 2013-01-14 21:59:07 UTC  |  Edited by: Skadi Asgaurd
Hi Guys,

I just wanna confirm with you if this cost calculation is correct

Cost per tech II BPC = ((datacore1cost * Xneeded) + (datacore2cost * Xnumberneeded)) * (totalinventionjobsrun /NumberOfSuccesses)

P.s. This is cost per BPC not per item produce from BPC.
P.s.s Not using Decryp or Meta item

How would you modify that formula to use a success rate percentage as I don't really want to update number of runs and successful runs after every invention job.

Thanks
Davion Falcon
Those Once Loyal
#2 - 2013-01-14 22:26:02 UTC
Sure, why not.

If the math is too difficult for you, then perhaps T2 invention isn't the way to go.

Ruthlessness is the kindness of the wise. Never forgotten, never forgiven.
Virajar
The Scope
Gallente Federation
#3 - 2013-01-14 22:48:12 UTC
I'd factor in the copy cost (or purchase price) of the T1 BPCs. Not super accurate but close enough for my liking.

You could replace (totalinventionjobsrun/NumberOfSuccesses) with an reciprocal average success rate.

So:

1/(average success rate) = (totalinventionjobsrun/NumberOfSuccesses)

For purposes of your formula.
Steve Ronuken
Fuzzwork Enterprises
Vote Steve Ronuken for CSM
#4 - 2013-01-14 23:06:08 UTC
http://www.fuzzwork.co.uk/blueprints/

A cost for the BPCs isn't a bad idea.
A cost for the invention slot isn't a bad idea.

Personal taste though.

Woo! CSM XI!

Fuzzwork Enterprises

Twitter: @fuzzysteve on Twitter
Zifrian
Federal Defense Union
Gallente Federation
#5 - 2013-01-14 23:06:08 UTC
Well the cost of doing a run is just the sum of the parts to do it, the real cost of the BP is based on your skills and your success rate. Then there are the costs of copies, which a lot of people ignore.

I would suggest just finding a tool that does it for you and save yourself the headache. Mine is linked below.

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Styth spiting
Brutor Tribe
Minmatar Republic
#6 - 2013-01-15 00:13:09 UTC
Costs involved for T2 invention:


  • Data interface (1 time cost, not consumed).
  • Required skillbooks (1 time cost, not consumed).
  • BPO cost (1 time cost, not consumed) if creating your own BPC's.

  • Slot cost, or fuel usage if using a POS (fuel cost for the slot) for making BPC if creating your own BPC's.

  • Or if not making your own BPC's you can subtract the cost of a BPO and BPC creation costs. Naturally you need to include the cost of the BPC.

  • Datacore 1 X number of datacores required.
  • Datacore 2 X number of datacores required.

  • Meta 0 - Meta 4 item to be used in the invention process (not required but not using one decreases your chances considerably).

  • Decryptor if used (generally you wont be using one).

  • Invention slot cost or fuel cost if using a POS.

  • Based on your chances of invention figure out the failure rate and include this into the manufacturing costs of the invented BPC. Generally 50% is common.

Iogrim
Matterhorn.
#7 - 2013-01-15 08:42:12 UTC  |  Edited by: Iogrim
X - datacore 1
Y - datacore 2

Cost per tech II BPC = ((X cost * X amount + Y cost * Y amount + BPC cost + decryptor cost) / invention chance %) / number of T2 BPC runs

Add BPC costs if you don't own BPOs, and decryptors only for ship invention. For modules generally you end up with 10 runs per T2 BPC.


EDIT, since I noticed a question there which has not been answered:
Skadi Asgaurd wrote:
How would you modify that formula to use a success rate percentage as I don't really want to update number of runs and successful runs after every invention job.


Full formula for invention chance is (http://games.chruker.dk/eve_online/invention_chance.php):

Invention_Chance = Base_Chance * (1 + (0.01 * Encryption_Skill_Level)) * (1 + ((Datacore_1_Skill_Level + Datacore_2_Skill_Level) * (0.1 / (5 - Meta_Level)))) * Decryptor_Modifier

For e.g. skills @ 4 and T2 module invention you would get base chance of 0.4826.

My historical probabilities after several thousand of jobs match the formula above.
Invictra Atreides
Toward the Terra
#8 - 2013-01-15 11:12:21 UTC
I would always add the T1 BPC price to it.

If you are making you own BPCs then your copy slot on the character is also worth something. I would say at least 100 mill ISK/month

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Emma Royd
Maddled Gommerils
#9 - 2013-01-16 06:25:17 UTC
I just keep a log in an excel sheet, every invention job I do, when I deliver the jobs I just put a "Y" in the success column, and have a separate column for "Count in Success Rate", so at any time, if I want to check how much the invention costs cost me, I just put a "Y" in the count in success rate box, and some excelfu happens and I get a Success Percentage displayed.

I would never use a supposed success rate as a way of working things out, I need to know the rate I get so I can decide if it's worth building off the items or not, or even worth running a few more invention batches to get the average up from a poor run, I might have only had a 10-20% success rate on one batch of 10, so by the time you calculate the overall invention costs for that batch, the cost per build means it's not profitable, so if I run more batches and increase the success rate to say 40-50% then the invention cost per build is lower.

In the xml you can get of your science and industry jobs, there is a column called "completedStatus" which once the jobs have been delivered should be a 1 if the invention job was a success, or 0 if it was a failure, I've not modified my excel sheet to work off this, as it doesn't take too long to go through and enter them manually.
shar'ra matcevsovski
Doomheim
#10 - 2013-01-16 06:59:16 UTC
Emma Royd wrote:
I just keep a log in an excel sheet, every invention job I do, when I deliver the jobs I just put a "Y" in the success column, and have a separate column for "Count in Success Rate", so at any time, if I want to check how much the invention costs cost me, I just put a "Y" in the count in success rate box, and some excelfu happens and I get a Success Percentage displayed.


I´d avoid the hassle and just use the skill based success chances. It saves you the hassle of typing the "y" after every single invention and more importantly its simply not as accurate as the skill based success chances. You´d need to do that for an unlimited amount of time to see its the same as the skill based percentages.


shar'ra phone home
Lors Dornick
Kallisti Industries
#11 - 2013-01-16 08:42:32 UTC
Emma Royd wrote:


In the xml you can get of your science and industry jobs, there is a column called "completedStatus" which once the jobs have been delivered should be a 1 if the invention job was a success, or 0 if it was a failure, I've not modified my excel sheet to work off this, as it doesn't take too long to go through and enter them manually.



in jEveAssets the "Industry Jobs" tab hands you that data ready to slice and dice as you wish.

No need to parse the xml by hand or spreadsheet (but selected data can easily be pasted into one).

CCP Greyscale: As to starbases, we agree it's pretty terrible, but we don't want to delay the entire release just for this one factor.
Iogrim
Matterhorn.
#12 - 2013-01-16 12:03:42 UTC
shar'ra matcevsovski wrote:
Emma Royd wrote:
I just keep a log in an excel sheet, every invention job I do, when I deliver the jobs I just put a "Y" in the success column, and have a separate column for "Count in Success Rate", so at any time, if I want to check how much the invention costs cost me, I just put a "Y" in the count in success rate box, and some excelfu happens and I get a Success Percentage displayed.


I´d avoid the hassle and just use the skill based success chances. It saves you the hassle of typing the "y" after every single invention and more importantly its simply not as accurate as the skill based success chances. You´d need to do that for an unlimited amount of time to see its the same as the skill based percentages.


Agree with this. I used to keep track of success % for different hulls, but after several thousand inventions I found it's very similar to the formula result, so abandoned the effort.