Back in the day, companies wanting to send their management team on a sales or team building trip, would ask the company PA to plan the trip. Having little practical experience, this led to many a famous cock up with the sales team sitting in Timbuktu airport when they should have been in Chicago.
That was long ago before specialist companies arrived that would take all that head ache away and utilise their highly specialist skills and knowledge to ensure that all such trips go seamlessly, and at the best price available.