For example, if we had two green leg items, one with +15 to a single stat and another +9 and +10 on two different stats, their calculated item levels would be 20.5 and 20.6. This isn't too fast of a growth, but it does cause a single high stat to be weighted fairly heavily.
This calculated item level matches Blizzards item level quite well. The end result is a calculated value for item level. The final modification takes into account item quality. Next, this sum is modified by the slot (or item type): It represents the feeling how 'good' an item is. The result, the Item Value, is a direct measure for the item's quality. First, the individual stats are each multiplied by their modifiers and taken to the 1.5 power, these terms are summed up and taken to the.
This calculation is a three step process.
ItemSlotValue - this is the ItemValue modified for the item slot.SlotMod - weighting for adjusting the value of an item based on equipment slot.ItemValue - the total value of the stats on an item.StatMod - the weighting given to a specific stat, this is how stats are compared in value.StatValue - the amount of a given stat on an item.
