The pattern of movement of the finished produced by road or rail must be planned properly. For example, when the requirements of the number of rail wagons are to be worked out, it is not sufficient to take the average lead or distance for the whole country for calculating fleet requirements. it is also not sufficient to use the figure of the existing average lead of general goods ,or even that pertaining to a specific commodity.
However, when it comes to actually transport, because of imprecise pre-planning, the manufacturer wants the commodity carrier to transport goods to anywhere and everywhere n the country. This presents a problem. The manufacturer provides information to the common carrier about the quantity o goods to be marketed. But detailed information must be supplied to the carrier so that the carrier can plan the movement in entirety.