“One of the most persuasive factors is the shrinking half-life of knowledge. The “half-life
of knowledge” is the time span from when knowledge is gained to when it becomes
obsolete. Half of what is known today was not known 10 years ago. The amount of
knowledge in the world has doubled in the past 10 years and is doubling every 18
months according to the American Society of Training and Documentation (ASTD). To
combat the shrinking half-life of knowledge, organizations have been forced to develop
new methods of deploying instruction.”