By customers or potential customers at their own locations

By an independent test team at the developing organization's location

At the developing organization's site, but not by the developing team

By customers or potential customers at the developing organization's site

If we do not regularly review and revise our tests, we'll stop finding defects

Repeatedly running a set of tests will ensure that a system is defect free

Defects are, paradoxically, often contained in a small number of modules

Testing, like spraying pesticide, is an effective bug / defect removal activity

Testing can demonstrate that there are no defects

Testing can demonstrate that there are defects

Testing can demonstrate that the software is correct

Testing can demonstrate that there are no hidden defects in the software