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system index cost...
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gantin Adoudel
Ars Goetia Corporation
#1 - 2014-11-10 21:03:17 UTC
Okay this is not a rant thread or QQ just kinda curious how the system index is factored?

As I read the bar it says the index is determined by the amount of jobs last month, but as of today I've seen the index climb .15% in a few hours is this working as intended?

Also how many jobs does it take to raise the index by .01%? cause as of right now it seems like it doesn't take a lot to raise the index.
Tau Cabalander
Retirement Retreat
Working Stiffs
#2 - 2014-11-11 00:02:49 UTC  |  Edited by: Tau Cabalander
If you are creating jobs in a very low-activity system, it doesn't take much to start the index rising, but you won't be able to easily move it very far beyond a certain point (well, not with a single account).


http://community.eveonline.com/news/dev-blogs/eve-industry-all-you-want-to-know/

CCP Greyscale wrote:
The base component of pricing is the system activity index. This value is tracked per activity (Manufacturing, Copying, ME research, TE research, Invention, Reverse Engineering), per system, so Jita will have a separate index for each of the six job types.

The index for a given activity-system pair is equal to the number of job-hours of that activity type in that system over the last 28 days, divided by the number of job-hours of that activity type in the universe as a whole over the last 28 days, and then square-rooted to give better numbers. This is then expressed as a percentage, which will tend to be in the low single digits, and can be all the way down to 0 at one end and (in theory) all the way up to 100 at the other.

I.e., where:

system_activity_job_hours is the total duration of all jobs of that activity type in that system over the last 28 days, and:

global_activity_job_hours is the total duration of all jobs of that activity type in the universe over the last 28 day, and:

system_activity_index is the index we’re creating, the formula is:

http://content.eveonline.com/www/newssystem/media/66335/1/system_activity_index.png

This index is then used in conjunction with job value to create a base cost. (For those of you who want to do the actual math, we suggest taking a read of this devblog.)


Other Changes:
http://community.eveonline.com/news/dev-blogs/delivering-the-industry-new-eden-deserves/