DMTs

Transport cost between an item Source or Demand is given by the distance between the KM (center of mass) of each Range item.

The DDM you can use the cost amount in which DMT fits in the list of DMT Ranges, or DMT itself between items. This is because the transport cost of the dmt range is not necessarily a linear function of the DMT.

The DDM program evaluates this distance in cases where the source has CBR, Expansion and Permeability acceptable by destiny, as well as geometrical impossibilities.

In case it does not answer, the program arbitrates a very large value instead.

This is a "trick" or feature of the Stepping Stone method, which consists of assigning a very high cost to the movement that one wants to avoid. In the table below, red items would be avoided

	Destination (1)	Destination (2)	Destination (3)	. ..	Destination (j)
Source (1)	Cost (1,1)	Cost (1,2)	Cost (1,3)	. ..	Avoid
Source (2)	Cost (2,1)	Avoid	Cost (2,3)	. ..	Cost (2,j)
Source (3)	Cost (3,1)	Cost (3,2)	Cost (3,3)	. ..	Cost (3,j)
...	...	...	...	...	...
Source (i)	Cost (i,1)	Cost (i,2)	Avoid	. ..	Cost (i,j)

By default the DDM program adopts 1000000 as DMT of the movements to be inhibited. This value can be modified in the DDM.ini file, in the "GENERAL" section, item "BigNumber":

But which moves should be inhibited?

Soil material, for example, should not be used in the landfill body, final layer or reinforcement. In this case, arbitrate it with CBR = 1, and Expansion = 10, that is, an unacceptable value in any demand other than a boot. Thus, this movement possibility will not be used in program simulation.

Another situation is when we have a river cutting the project and the materials cut in a stretch before the river, can not be taken for stretches after the river. In this case, you should inform this in the Limiters tab.

Please note:

After evaluating these DMTs, the user can still override any of these values.
In the Transport Costs tab, if any value appears with the text written in red, means that it is a movement to be avoided.
To have data in the DMTs tab, there must be ranges of source and demand.

Finally, you can move to the distribution calculation.