Every port has a domestic materials index ('DMI') value of between zero and 10.
The DMI is a measure of the volume and value of materials available at the port that are used domestically by the port's industry.
Unlike raw materials, domestic materials are not available for export.
By varying the levels of DMI and RMI and also the level of industrialisation you can set the effective production value of the port as well as the degree of its dependence on raw materials convoyed in. For example, a port with a very high industrialisation factor but very low DMI and RMI has a good potential to produce but will only fulfill that potential if you can convoy in raw materials in quantity.
Otherwise, they contribute to production at a port in the same way as do raw materials.
Changing the DMI levels can have a big affect on the value of a country's economy, and hence on the starting odds also.
As DMI values are changed you should notice the odds change also (unless the change is small).
Note that it is most productive to have a high DMI (and high industry level) at your home port, because this is where new aircraft and troop unit production and most new ship construction is likely to occur.
To change the DMI level for the currently selected port, just select a new value in the combo box.
Click here to return to the help page detailing what other port parameters you can change.