The transport of samples to the laboratory must fulfil one criterion above all: Speed. Often the order is on call, so that hospitals and doctors' surgeries are only approached if they confirm their need in advance. For the laboratories, this means a high proportion of on-call customers who have to be integrated into the route plan - in addition to the fixed customers who are called on daily. There is a high communication effort: the order is usually received by telephone. With a large number of call-off customers, this takes a lot of time. The drivers have to be informed on the way, but often the order does not match their current location. Another challenge is the lack of documentation of the tours. This makes billing difficult, especially if a service provider was on duty.