By Nick Jenkins
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Extra info for A Software Testing Primer
An optional item of information testers can supply is a proposed solution. Testers often have unique and detailed information of the products they test and suggesting a solution can save designers and developers a lot of time. An optional field to allow development managers to assign relative priorities to defects of the same severity An optional field allowing developers to assign a root cause to the defect such as “inadequate requirements” or “coding error” Expected behaviour Actual behaviour Impact (Proposed solution) Priority Root Cause 33 Test Reporting and Metrics Defect Status Report Software Defect Reports 18 At a basic level defect reports are very simple: number of defects by status and severity.
Release Candidate The first version of the software considered fit to be released (pre final testing). Requirement A statement of need from a stake-holder identifying a desire to be fulfilled ROI “Return On Investment” – a ratio which compares the monetary outlay for a project to the monetary benefit. Typically used to show success of a project. RUP Rational Unified Process – a software development methodology focussed on objectoriented development. Developed by the big three at IBM-Rational Corporation.
Are requirements changing during development? Are they incomplete? Are they incorrect? Once you have this data you can quantify the proportion of defects attributable to each cause. Classification Requirements Count 12 % 21% In this table, 32% of defects are attributable to mistakes by the test team, a huge proportion. Design Error 5 9% Code Error 9 16% Test Error 18 32% Configuration 9 16% While there are obviously issues with requirements, coding and configuration, the large number of test errors means there are major issues with the accuracy of testing.