Our original DKP system functioned like all others. You gained points for each raid attended. This, however, can lead to problems of making it EXTREMELY difficult to get new members up to level where they'd actually be able to get stuff in addition to the potential of members hording points.

To combat both of these problems, the officers and I have constructed a system of "DKP Decay". This means that DKP awarded for older raids (and also older item purchases) will decay over time.

This does 2 things.

1) It prevents effective hording of points, as your older points will slowly diminish, thereby inspiring members to spend the points they have now, rather than trying to horde them.

2) Allows the newer members to catch up more quickly, as every day the older members' raids will be more and more weakened in value.

It's all powered by a single square root formula:

Let d = number of days ago the DKP(s) was/were awarded

if d <=45 then e = 1

else e = sqrt(145-d)/10

if e <= 0.25 then e = 0.25

Where e is the effective DKP value

That's it.

Example 1:

Lets say you attended a raid 90 days ago,

e = sqrt(145-90)/10 = 0.74

So that raid is now worth 0.74 DKP

Example 2:

Lets say you received a 12 DKP item 113 days ago,

e = sqrt(145-113)/10 = 0.57

Each DKP for that item is then worth 0.57 DKP.

So the total amount of DKP the nearly-4-month-old purchase is

0.57 * 12 = 6.84 DKP

What this means, is that the 12 DKP purchase, as decayed to being worth only 6.84 DKP.

Doing this rewards people for spending DKP, since the items they've bought will slowly decay away in value. If you bought a 20 DKP item a year ago, it will have decayed to 5 DKP by now.

In short, after 45 days, DKP start to decay, at which point it will take roughly 3 months for each DKP to decay to a quarter it's original value. So the sooner you spend your dkp, the sooner those spent DKP will begin to decay.

To demonstrate the benefit of spending your DKP, Observe the following chart. This is a theoretical situation demonstrating if Sweet had made a dkp purchase of 10 DKP about 35 days before he went MIA, as well as had he NOT made a purchase.

Notice the difference in rate of decay for the top curve and the bottom curve. Clearly your dkp decay much more slowly when you make a purchase.

What makes this new system ideal is that it weighs RECENT activity more heavily than past activity. This means that in order to remain high on the charts, you must stay active. If you go on vacation for a month, yeah, you'll lose some points, but gaining those points back won't be terribly difficult. This is a way to make sure people KEEP on attending the raids.

I hope this is clear to everyone.

The Current Standing page has been modified now to support this change, as well as adding a nice little graph to both that page, and to each member page. This makes it easy to track the dkp history of each member. The officers and I will be using those graphs to track any trends (too many people getting too many DKP), and whatnot. Ideally, we'd like to keep the max DKP anyone can have around 50 or 60. If people start amassing more than that, then we're looking at too large a curve before the newer members can get gear.

To see more examples of the curve of dropoff, look at Dude, Sweet, Delamite, Darksound (who was gone for a little over a month), and Lumadar's History on the Chart.

Also, please be aware that both the graph and the DKP decay calculations run at 5am every morning. So don't expect the data to be updated immediatly. Because of the complexity of the calculation (especially in generating the graph), it must be on a cron-job as opposed to calculated on the fly.