When sam describes modeling the inputs and outputs of an is and understanding how they relate to other systems, she is describing

System thinking

Explanation:

 Sam describe the modeling of the input and output of the information system (IS) and she basically refers to the system thinking. As, system thinking is the approach in which it basically provide the broad prospective to view the system.

It basically improve the way of thinking approach by including various effective pattern and structure in the information system. It also help us to achieve the better results.  

It basically help various people for view the system in technical approach rather than specific and short information.