In Rapid Development, McConnell discusses methods of "designing for change". (Meaning to design software in a way that makes it easier to modify.)

Name two of the five methods that he describes. A one or two sentence description of each is fine.

• Identify areas that are likely to change, and make it easy to change these items.
   
• Use information hiding, so that data and operations can change in just one place.
   
• Develop a change plan, so that changes are handled in a smooth manner. (Or, expect that there will be changes and plan how to handle them.)
   
• Define families of programs, so that code can be shared between related programs.
   
• Use object-oriented design and coding. (But it still must be good OO design.)