Nature of materials to move
Volume and distance
Value of materials, as expensive items raise inventory costs and encourage faster modes
Importance, as even low-value items that would hold up operations need fast, reliable transport
Transit times, as operations that have to respond quickly to changes cannot wait for critical supplies using slow transport
Reliability, with consistent delivery often being more important than transit time
Cost and flexibility to negotiate rates
Reputation and stability of carrier
Security, loss and damage
Schedules and frequency of delivery
Special facilities available
Email your lecturer of your thought.