Geographic Maps
With the level of detail defined, construction of the maps can begin.
Physical locations are usually placed on the map first, followed by the product-family routes between the locations
There are two basic strategies to assemble the maps by the type of material movement or by supply chain.
In the case of suppliers, many teams map the phisical locations of a few top suppliers for each main commodity type. One strategy to gather accurate data on transportation routes is to focus a subteam on collecting and summarizing freight bills.
Freight bills contain the important details of the item, quantity, sales value, freight expense, and delivery cycle time, point of origin, and destination. Depending on the transportation carriers used, much of this data may be available electronically