- One cannot test a program completely.
- One can only test against system requirements.
- May not detect errors in the requirements.
- Incomplete or ambiguous requirements may lead to inadequate or incorrect testing.
- Exhaustive (total) testing is impossible in present scenario.
- Time and budget constraints normally require very careful planning of the testing effort.
- Compromise between thoroughness and budget.
- Test results are used to make business decisions for release dates.
- Even if you do find the last bug, you’ll never know it.
- One will run out of time before you run out of test cases.
- One cannot test every path.
- One cannot test every valid input.
- One cannot test every invalid input.
- No absolute proof of correctness: Unless a formal specification can be shown to be correct and, indeed, reflects exactly the user's expectations, no claims of product correctness can be made.
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