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Testing of unit 4 's crowbar is being setup for testing today and Monday . If this conviction is based on comparison , why test if we do n't test everything ? To test longevity , Sherman and Walker devised an aging test , an accelerated way of mimicking the cycling of a home or office-building HVAC system from night to day and winter to summer ( although at less extreme temperatures ) . This false rationale , in turn , is being used to engineer a sweeping change in test use in the U.S. Currently , six more states plan to introduce graduation tests - - even though there is no evidence they will help improve student learning . The report concludes with several recommendations for proper test use and practices directed at classrooms , schools , districts , school boards , state governments and the federal government . The potential benefits and the drawbacks of each approach are explored , with the NRC concluding that " ensuring appropriate test use will require multiple strategies " and that further research on these and other policy options is needed . IBM benefits greatly from the pool of fresh recruits that not only know software testing theory , but will also have excellent knowledge of software testing tools and direct testing experience .