SOLUTION

• Replacing the presentation & application toolkit are the portability concerns founded in Seeheim model.
• The Seeheim model separates the dialogue structure from the presentation of the user interface.
• The presentation part specifies the layout of the input and output and the dialogue part specifies the logics and functionality of these input-and output-elements.

The portability concerns founded in Seeheim model are-

1. Replacing the presentation toolkit
2. Replacing the application toolkit.