A major objective of testing is failure prevention.
Testing must be planned.
Testing should be done by people who are independent of the developers.
Test Selection Strategies Every systematic test selection strategy can be viewed as a way of dividing the input domain into subdomains , and selecting one or more test case from each. The division can be based on such things as code characteristics (white box), specification details (black box), domain structure, risk analysis, etc. Subdomains are not necessarily disjoint, even though the testing literature frequently refers to them as partitions.