The developer will want his product to be delivered, but his approach to testing will be exactly just that. He won’t be as eager to break his product as someone who isn’t involved in its production. Glenford Myers (author of The Art of Software Testing) states that a developer’s state of mind is that of a person building and creating while a tester’s state of mind is intent on finding flaws.īoris Beizer (author of Software Testing Techniques) stated, “Half a programmer’s professional life is testing, yet less than 5% of all the programmer’s education will be devoted to testing.” There is an extremely high risk in attempting to deliver any form of software based on this level of testing alone. Rigorous testing, the view of the person writing and performing the tests can be clouded by bias. While it could prove useful as a precursor to more There is a clear absence of independence in this type of testing. Development testing by the programmerĭeveloper testing is prepared and executed by the person who wrote the software. We must also consider that testing is only effective if it is carried out as a destructive process. To appreciate why these levels are lacking in independence, we should consider the differing views, approaches and goals of the people who are engaged to deliver them. These two questions might help us understand why independence in testing is important.īefore focusing on the importance and benefits of independent testing we will look at those levels of testing that are not fully independent.
If a judge was a regular guest at an accused’s or prosecutor’s dinner parties, could you be confident that his adjudication of an impending court case would be impartial? I certainly wouldn’t. What do you think would happen if an individual car manufacturer was suddenly made responsible for carrying out all MOT’s? Yes, the roads would soon be full of that manufacturer’s vehicles. Without this independent advice the risk of being taken advantage of or making the wrong decisions would become much higher. Examples of this are the advice and help they receive from independent insurance brokers, independent financial advisors or even the advice they take from friends and acquaintances in certain situations. Independence is a quality that is highly valued by many in their day-to-day lives.
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