The Cost Definitions dialog is used for defining rules upon which costs will be calculated.
Each cost definition is a tree structure with rules how to compute costs.
The computation engine is traversing the tree structure to find the suitable rule.
It is a purely grouping level. So for example if you are defining airport handling costs you may use company activity filters in cost sets to group by airport. A cost set has the following fields:
Add Value Company Activity:
Order of sets is important as the cost calculation engine checks the rules in the order they appear in the tree view and it'll use the first matching value.
So the more specific rules should be present before the more general.
For example: a cost set defining handling costs for MMX airport should be before a cost set without a filter (in this context the meaning is that it handles all other airports).
Add Value Rosterblock Activity: