Tony Bates: ACTIONS model
Access: how accessible is a particular technology for learners? How flexible is it for a particular target group?
Costs: what is the cost structure of each technology? What is the unit cost per student?
Teaching and learning; what kinds of learning are needed? What instructional approaches will best meet these needs? What are the best technologies for supporting this teaching and learning?
Interactivity and user-friendliness: what kind of interaction does this technology enable? How easy is it to use?
Organizational issues: what are the organizational requirements, and the barriers to be removed, before this technology can be used successfully? What changes in organization need to be made?
Novelty: how new is this technology?
Speed: how quickly can courses be mounted with this technology? How quickly can materials be changed?