readings icon presentation iconquiz iconresources icon

6.6 Modal and carrier selection

There are a number of service characteristics that need to be considered prior to selecting a particular mode of transportation and more specifically the type of carrier to be used for a particular shipment of goods. The important service characteristics are usually related to the cost, speed and dependability. Others that affect the selection process are capability, availability and adequacy of equipment, availability of service, frequency of service, security, claims handling, shipment tracing and problem-solving assistance to name just a few.

When a transportation service is not used to provide a competitive advantage, the best service choice is found by trading off the cost of using a particular transport service with the indirect cost of inventory associated with the performance of the selected mode. That is, speed and dependability affect both the shipper's and the buyer's inventory levels (both order quantity stock and safety stock) as well as the amount of inventory that is in transit between the shipper's and buyer's locations (Ballou 2004, p220).

When evaluating alternative choices of transportation, it is necessary to consider the lowest total cost, which includes not only the cost of transportation, but also the cost of the inventory that is required as a result of the choice of transport mode. When slower and less reliable services are selected, for example, it is necessary for shippers and buyers to carry higher levels of inventory, both order quantity stock and safety stock. Moreover, the selected service should be consistent with customer service goals while meeting customer service objectives.

In your text

Please read pages 222 and 223 of your text. These pages explain the competitive consideration and the appraisal of transport selection methods.

You will be expected to calculate the basic types of vehicle routing problems and worked examples of these are illustrated on pages 191-198. Please study these examples carefully.

Reading 6.3

Wisner, JD & Tan, KC (Fall 2000), 'Supply chain management and its impact on purchasing', The Journal of Supply Chain Management, pp. 33-42.

previous page arrow Previous Page - Next Page next page arrow