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Blueprints: How exactly is material cost calculated?
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Zanza Mechonis
What is tax
#1 - 2012-07-21 23:43:07 UTC
I have run into a calculation problem with blueprints: On a Caldari Shuttle BPO, freshly bought off market, the perfect trit use is 2750. Without any levels of Production Efficiency, it takes me 3375. I tried calculating it to a different level of Production Efficiency, as I have it queued, however I have run into a problem.

3375/1,25=2700. Not the 2750 I expected.
2750*1,25=3437,5. Not 3375. Not expecting it to work, I tried this:
3375*0,75=2531,25. The only thing that I expected wrong.

My question is: How exactly ARE they calculated? If I include wastage factor I seem to be going even further off course, even though I already read that doesn't matter as it's taken into the perfect value. What am I doing wrong?

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gfldex
#2 - 2012-07-22 00:26:35 UTC
Zanza Mechonis wrote:
How exactly ARE they calculated?


Like this.

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Zanza Mechonis
What is tax
#3 - 2012-07-22 00:38:11 UTC
gfldex wrote:
Zanza Mechonis wrote:
How exactly ARE they calculated?


Like this.


I only skimmed the page a bit, but it's talking about wastage factor, which is shown on the blueprint, not how my own material use is calculated compared to the "perfect" value...

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Tau Cabalander
Retirement Retreat
Working Stiffs
#4 - 2012-07-22 02:48:27 UTC  |  Edited by: Tau Cabalander
When you have Production Efficiency 5, you no longer see [Perfect] on BPO (no loss from incompetence).

For M.E. >= 0
Total Material = ROUND(Base Material * (1.25 + Base Waste / (1 + Material Level) - Production Efficiency Skill * 0.05))

For M.E. < 0
Total Material = ROUND(Base Material * (1.25 + Base Waste * (1 - Material Level) - Production Efficiency Skill * 0.05))

Base amounts can be found from a database dump or
Base Waste = Waste shown on an unresearched BPO
Base Material = ROUND(Material amount shown on an unresearched BPO / (1 + Base Waste))

Perfect Material Level = FLOOR(Largest Material Count on M.E. 0 BPO / ((1 + Base Waste) / (2 * Base Waste)))
for 10% base waste BPO: Perfect Material Level = Largest Material Count on M.E. 0 BPO / 5.5 and drop the fraction (don't round)
for 5% base waste BPO: Perfect Material Level = Largest Material Count on M.E. 0 BPO / 10.5 and drop the fraction (don't round)

Note that material marked as EXTRA (can be seen in a manufacturing quote) does not have any waste!
Steve Ronuken
Fuzzwork Enterprises
Vote Steve Ronuken for CSM
#5 - 2012-07-22 02:57:01 UTC
Take a look at
http://www.fuzzwork.co.uk/blueprints/


It should help a bit, to see how the numbers change.


Anyway, what's happening:

Waste due to the ME is applied. (10% of the true perfect. which is 2500).
Waste is then applied due to your production efficiency. This is not a cumulative modifier. So it's another 25% of that 2500, or 625.
Which should bump it to 3,375





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J'Poll
School of Applied Knowledge
Caldari State
#6 - 2012-07-22 21:37:44 UTC
The you need part: materials you need for production, takes into account you production efficiency skill as well as the ME level of the blueprint.

The perfect part: materials needed for the blueprint taken into account you have production efficiency trained to level 5 as well as the ME level of the blueprint.

Researching ME level on a bpo means both numbers will drop (untill you reached the perfect ME level, this means no waste due to low ME level)

Training production efficiency skill up will drop the you need part to bring it closer to the perfect list (with the skill at 5 you only see the perfect part)

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Mara Rinn
Cosmic Goo Convertor
#7 - 2012-07-22 22:36:13 UTC
Zanza Mechonis wrote:
I only skimmed the page a bit, but it's talking about wastage factor, which is shown on the blueprint, not how my own material use is calculated compared to the "perfect" value...


I guess many industrialists have made the assumption that anyone getting into manufacturing will have heard or read the advice about getting production efficiency to 5 before even bothering to start, which is why that piece of advice never actually makes it into print :)

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Steve Ronuken
Fuzzwork Enterprises
Vote Steve Ronuken for CSM
#8 - 2012-07-22 22:58:06 UTC
PE 4 is ok for some production runs (especially T2 modules.) Just run the numbers first.

If you're serious though, PE 5 all the way.

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Zanza Mechonis
What is tax
#9 - 2012-07-23 02:29:36 UTC
Mara Rinn wrote:
Zanza Mechonis wrote:
I only skimmed the page a bit, but it's talking about wastage factor, which is shown on the blueprint, not how my own material use is calculated compared to the "perfect" value...


I guess many industrialists have made the assumption that anyone getting into manufacturing will have heard or read the advice about getting production efficiency to 5 before even bothering to start, which is why that piece of advice never actually makes it into print :)


So what in the 17 days where it's only IV, and what about the situation where you can't be bothered training it to V as you only manufacture your stuff to have it cheaper than buying straight off market? :D #Justsayin'

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Steve Ronuken
Fuzzwork Enterprises
Vote Steve Ronuken for CSM
#10 - 2012-07-23 02:46:51 UTC
In those cases, you use a blueprint calculator to work out if it's ok Blink

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Fuzzwork Enterprises

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Zanza Mechonis
What is tax
#11 - 2012-07-23 12:50:06 UTC
Steve Ronuken wrote:
In those cases, you use a blueprint calculator to work out if it's ok Blink



^which was my point exactly :P Thanks ^^

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