-Is it important to build models? Can you develop a system just as well without any models?
-When is it important to save the models you have developed? Then when is it important to make the models more formal so that they remain? How long should models be maintained or kept?
-Which models might be most helpful? Analysis (understanding) models or Design (solution) models?
-How does the size of the project team affect the modeling requirements?
-How does the size of the solution system affect the need for models?