• Testing begins at the component level and works outward toward the integration of the entire computer-based system.
• Different testing techniques are appropriate at different points in time.
• The developer of the software conducts testing and may be assisted by independent test groups for large projects.
• The role of the independent tester is to remove the conflict of interest inherent when the builder is testing his or her own product.
• Testing and debugging are different activities.
• Debugging must be accommodated in any testing strategy.
• Need to consider verification issues
• are we building the product right?
• Need to Consider validation issues
• are we building the right product?
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