Substitution:	What is or will be gained by replacing old technology with new?
Substitution to augmentation:	Has an improvement been made to the task process that could not be accomplished with the older technology at a fundamental level?
Augmentation to modification:	Has the original task been modified? How? Does the modification fundamentally depend on the new technology?
Modification to redefinition:	What is the new task? Will any portion of the original task be retained? How is the new task uniquely made possible by the new technology?