>The assertion has been made that typical applications have between 40%-50% of their code actually run during testing.
>
>I am curious to see what percentage of code you test (actually run during development/unit test/system testing) for:
>
>1) The development of a system from scratch.

I test each module that has been completed.
>
>2) The development of a new/replacement system but using code parts (including classes, functions, etc.) from existing and well-running systems.
>
All of the menu items.

>3) Developing revisions to an existing application.
>
The specific revision first, and then all of the menu items to see if there has been any impact.

>Thanks for your reply.
Welcome.