>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.
>90-95% all application, sometimes from more than one programmer. But for my regret again appears some bugs, when customers begin to use it, even after that hard testing.
>
>2) The development of a new/replacement system but using code parts (including classes, functions, etc.) from existing and well-running systems.
>90-95% testing procedures are the same, as if we develop from scratch.
>
>3) Developing revisions to an existing application.
>50-60% - all related to changed parts of application
>
>Thanks for your reply.