Abc analysis: a classification of items in an inventory according to importance defined in terms of criteria such as sales volume and purchase volume. Abc classification

Denied Party Listing (DPL): A list of organizations that is unauthorized to submit a bid for an activity or to receive a specific product. For example, some countries have bans on certain products like weapons or sensitive technology.
Density: A physical characteristic measuring a commodity's mass per unit volume or pounds per cubic foot; an important factor in ratemaking, since density affects the utilization of a carrier's vehicle.
Density rate: A rate based upon the density and shipment weight.
Deregulation: Revisions or complete elimination of economic regulations controlling transportation. The Motor Carrier Act of 1980 and the Staggers Act of 1980 revised the economic controls over motor carriers and railroads, and the Airline Deregulation Act of 1978 eliminated economic controls over air carriers.
Derived demand: The demand for a product's transportation is derived from the product's demand at some location.
Design for Manufacture/Assembly (DFMA): A product design methodology that provides a quantitative evaluation of product designs.
Design of Experiments (DOE): A branch of applied statistics dealing with planning, conducting, analyzing, and interpreting controlled tests to evaluate the factors that control the value of a parameter or group of parameters.
Destination: The location designated as a receipt point for goods/shipment.
Detention: The carrier charges and fees applied when rail freight cars and ships are retained beyond a specified loading or unloading time. Also see: Demurrage, Express.
Devanning: The unloading of cargo from a container or other piece of equipment. See Stripping.
DFMA: See Design for Manufacture/Assembly (DFMA).
DFZ: See Duty Free Zone
Differential: A discount offered by a carrier that faces a service time disadvantage over a route.
Direct Channel: This is when your own sales force sells to the customer. Your company may ship to the customer, or a third party may handle shipment, but in either case, your company owns the sales contract and retains rights to the receivable from the customer. Your end customer may be a retail outlet. The movement to the customer may be direct from the factory, or the product may move through a distribution network owned by your company. Order information in this channel may be transmitted by electronic means.
Direct Cost: A cost that can be directly traced to a cost object since a direct or repeatable cause-and-effect relationship exists. A direct cost uses a direct assignment or cost causal relationship to transfer costs. Also see: Indirect Cost, Tracing