Validating the acceptability of a software product
Validating the acceptability of a software product - Xxx rated couples on web cameras free
What is certain is that there is a balance between testing effort and the degree of quality.
Testing a complex solution cannot usually be achieved in a single step.
(By the way, none of these issues related to any accidents or injuries.)This chart shows the errors found in the code in the period 1988 to 1993: A company's pension fund bought a software package to manage their pensions. The software supplier's main defence was that you had to be very stupid not to test a computer application. The main goal of formal testing is to produce a sound, logically valid proof that the results meet desired levels of confidence.
Years later, when that system was being replaced, parallel running showed a consistent discrepancy in the results from the new system. Testing must be conducted in a carefully controlled manner to achieve this.
There is a practical view that the more testing you do, the closer you get to finding all the errors - but to reach a perfect result would require infinite effort.
You would choose, therefore, how much effort was justified to achieve an acceptable compromise between effort and quality.
Trial runs or operational pilots can also test the overall solution.
There is a naive view that if you do the right amount of testing the end-product will be correct.
There is a realistic view, as demonstrated by Myers, that you will not approach zero errors, but, instead, approach the limit of faults that would ever be uncovered by a formalised testing process.
There is a chaos-theory view that once you reach the limit, the disruption caused by further dabbling with the solution will generate more problems than are solved.
There is a scientific / mathematical view that you can logically define a test process which will cover every designed aspect of a solution and thus create a complete proof of the solution.
It is a good theory but it is hard to find practical examples.
It does not concern itself with whether it meets the users' functional needs, but it is concerned about the demands they will place upon it. Having a complete, fictitious world in which to follow realistic storylines is a good way to test out the various business scenarios.