The first wave of third-party logistics providers offered a discrete set of execution-based services, such as warehousing and transportation management. Now, the 3PL landscape is changing, in answer to companies' greater need for outside help in managing their supply chains. Greg Aimi, research director with AMR Research, traces the evolution of 3PLs and discusses how far they've come - and how far they need to go - in becoming "one-stop" providers of multiple supply-chain services. Some companies are relying so heavily on external partners that they have essentially outsourced their supply chains. Others are careful to keep certain logistics responsibilities in-house. Aimi discusses some of the questions that should be asked before making this determination. [Run Time (Min): 14:21]