Training is an on-going process, given the intrinsic nature of it's function; as you've so aptly put it. It thus, has to involve innovation, ingenuity, imagination at almost every step of it's existence. A training module/capsule needs to be dynamic and, in sync with customer requirements; internal and external customers! Perhaps, ONE important aspect that most corporate training cells fail to accept and implement is the need to CALIBERATE! To constantly upgrade your training and to enhance it's utility value to the employees, you might like to compare the existing standard with new comers; a one-2-one face-off is a good option.