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Your opinion, or anything related to the topics on testing!
I personally believe that testing isn’t just coming up with tests for desired use cases. We need to consider malicious use cases, too. And testing in development isn’t good enough either: we need to test with live systems, in situ. Because if we don’t, something, somewhere, is going to go wrong.
Dear all,
Testing is my right arm as I don’t want to be the person telling MY boss that, “well, we thought it might, but we never tested it.”
Dear all,
Testing is my right arm as I don’t want to be the person telling MY boss that, “well, we thought it might, but we never tested it.”
I think, eliminating testing in natural sciences, engineering, and social sciences is suicidal for obvious reasons. However, the question about what testing is necessary and sufficient are quite actual in different domains. Usually, it's a tradeoff between a complete solution's cost and its reliability, and has a particular reasoning in every domain of interest.
Certainly not because it may be tested in the future and shows that it works in an excellent way and better than others
Hello Mohammed,
I think most technical people would say that testing is essential, but I agree with Len Leonid Mizrah that there are real questions about whether testing is necessary and sufficient. For example, some systems cannot be tested such that all possible permutations of inputs and outputs can be tried. Software is a good example of a modern system where testing is a necessary condition to demonstrate that it "works", but if it is shown to "work" that does not imply that it was completely tested. Otherwise how can you account for the invariable presence of bugs in most software? And, of course, if the software is coupled to hardware and the hardware, in turn, is coupled to a GUI for human input and output, well, then you really have an insurmountable problem. Think of the fly-by-wire systems in passenger airplanes. You can always say that you tested the system, but what does that really mean?
I would extend Luciano de F. Costa remarks to include both verification and validation. With regard to a system, verification means did you build it right? Validation, on the other hand, means did you build the right thing? You can sometimes test to verify that the system was built to plan or specification, but testing for validation is many times impossible. For example, large scale defense systems are built with the idea of discouraging an attack by an enemy, but how can you be sure that the system you built is the right one to prevent attack? The Cuban missile crisis in the 1960's is a good example of where verification and validation testing could not be done. As the years pass and we learn more and more about the details of what each side was thinking and prepared to do, it seems like a miracle that WWIII did not happen. Think of the three Soviet submarines sent to Cuba with nuclear tipped torpedoes, who were chased down by the US Navy.
Anyway, I really like your question.
Regards,
Tom Cuff
Dear Len Leonid Mizrah - thank you for your reply! Excellent points!!
Dear Luciano da F. Costa - You are very welcome and thank you for your reply!!!
Testing should be done for each and everything before this was kept in use. If one buys a computer one has to test the functioning, working, wiring and configuration. If everything is yes, then the system functions well. If not, the parts are to be replaced or the computer has to be changed.
Yes, testing is necessary to evaluate effectiveness and efficiency.
Hi,
Every phase of a new product development would have involved testing/cross-verification. As humans, we may have committed an error somewhere; IT explains why we have a QA/QC division in well established labs too. So, instead of being prejudiced, it is better to test and establish the functionality.
An equipment which is purchased has to be tested before it works. Take for example a motor connected to lift the water. This should be connected and tested. If this is not working, then this should be rectified or replaced. The winding problem or wires problem or switch or switch board or mains problem should be known and decision be taken.
One just not know whether something does or does not work. In addition, if the testing is not of high quality, one still does know after testing whether the tested product works or does not work.
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