What is Hannum and Hansen model in Instructional Design?

There isn't a widely recognized or established "Hannum and Hansen model" in instructional design. While many instructional design models exist (ADDIE, Gagne's Nine Events, Merrill's Principles, etc.), a model specifically attributed to individuals named Hannum and Hansen isn't part of the standard literature or curricula.

It's possible:

* The names are slightly misremembered or misspelled: There might be a similar-sounding model or a less-known model from researchers with similar names.

* It's a proprietary or internal model: Some organizations develop their own instructional design models tailored to their specific needs, which wouldn't be publicly known.

* It's a misinterpretation: The reference might be to a specific element or technique within a broader model, rather than a complete model itself.

If you encountered this term in a specific context (a book, article, course), providing that context would help in clarifying its meaning. Otherwise, it's likely not a standard instructional design model.