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How do you factor invention into cost of t2 production?
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PaperLion
Old Man Industrial and Mining
#1 - 2012-07-31 17:02:23 UTC
I'm an experienced T1 manufacturer, and have trained up to Spreadsheets V. I'm pretty good at figuring out the margins on T1 products (including the cost of the BPO / BPC, market costs, transportation costs). Anyone have a good example of a T2 spreadsheet that factors in the chance of invention _not working_?

I just ran my first invention job, and it failed. It was sad, but it was low cost. I plan on running it again, but I'd like to know how many times I should re-try before the job goes upside down.

My gut feeling is to switch the spreadsheet around to focus on individual end to end jobs - tracking costs as I go, rather than creating a general purpose spreadsheet that helps me figure out whether a T1 job is profitable. Is going more granular on a job the right way to track T2 invention / manufacturing?

(Also - I could just buy T2 BPC contracts...but that's less fun)
Ryelek d'Entari
Horizon Glare
#2 - 2012-07-31 17:43:52 UTC
Bath Sheeba
Another Success Story
#3 - 2012-07-31 18:36:35 UTC
I do it this way:

C == Per unit invention cost on a module
B == Base cost of 1 invention run
P == Percent chance of success as a decimal(50% == .50 75% == .75, etc)
R == # of runs per success

C = B / (P*R) or C=B/P/R


There ya go.
PaperLion
Old Man Industrial and Mining
#4 - 2012-07-31 19:38:08 UTC
Bath Sheeba wrote:
I do it this way:

C == Per unit invention cost on a module
B == Base cost of 1 invention run
P == Percent chance of success as a decimal(50% == .50 75% == .75, etc)
R == # of runs per success

C = B / (P*R) or C=B/P/R



This is great, thanks...is the number of runs per success consistent? From the docs, it seems like it's random?
Velicitia
XS Tech
#5 - 2012-07-31 20:22:14 UTC
PaperLion wrote:
Bath Sheeba wrote:
I do it this way:

C == Per unit invention cost on a module
B == Base cost of 1 invention run
P == Percent chance of success as a decimal(50% == .50 75% == .75, etc)
R == # of runs per success

C = B / (P*R) or C=B/P/R



This is great, thanks...is the number of runs per success consistent? From the docs, it seems like it's random?


Yes and no. Depends on the input BPC you're using, plus any run-modifying decrypters you use.

Assuming a 1-run BPC (say a frigate -- I assume they're 40%)

C = B / (0.4 * 1)

One of the bitter points of a good bittervet is the realisation that all those SP don't really do much, and that the newbie is having much more fun with what little he has. - Tippia
Tau Cabalander
Retirement Retreat
Working Stiffs
#6 - 2012-07-31 21:28:55 UTC  |  Edited by: Tau Cabalander
Cost Per Run = Invention Materials Cost / Invention Success Chance / Number of Runs of T2 BPC

Materials includes BPC, datacores, decryptors if used, and meta item if used.
Ginger Barbarella
#7 - 2012-07-31 22:23:07 UTC
PaperLion wrote:
...and have trained up to Spreadsheets V



Nice.

That's all. :)

"Blow it all on Quafe and strippers." --- Sorlac
Bath Sheeba
Another Success Story
#8 - 2012-08-01 03:07:05 UTC
I do module invention so that is consistent at 10 per successful invention.


If you add in decryptors, my formula still works, as decryptors affect runs output and success chance.
Zifrian
Federal Defense Union
Gallente Federation
#9 - 2012-08-01 16:29:11 UTC
I use the program linked in my sig but use the logic above as well.

There are a lot of factors to consider though and many sheets etc do not. Ie copy costs.

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Captain CarlCosmogasm
Cosmogasm
#10 - 2012-08-02 15:53:57 UTC  |  Edited by: Captain CarlCosmogasm
A little detail behind the formula mentioned above.

-Base Costs
primary data core cost
+ secondary data core cost
+ decryptor cost
+ BPC cost

-Chance of Success
Base Chance of Success - depends on what you are inventing
x Decryptor modifier
x skill modifiers = (1 + encryption skill level * 0.01)*(1 + primary science skill level * 0.02 + secondary science skill level * 0.02)

-Run on result T2 BPC
Base Runs
+ Decryptor Bonus Runs
Bath Sheeba
Another Success Story
#11 - 2012-08-02 18:32:45 UTC
Thanks Captain Carlcomogasm, that is a more detailed way to describe the vars.
Shayla Sh'inlux
Aliastra
Gallente Federation
#12 - 2012-08-03 00:16:39 UTC
Bath Sheeba wrote:
I do module invention so that is consistent at 10 per successful invention.


Only if you use max-run BPCs :)