过去的观点认为，测试人员或质量保证人员的角色通常是在软件开发好以后才介入的，因果颠倒。
Historically, the role of a Tester or QA has often been post-hoc, taking place after software has been created.
当然，其他诸如开发人员，质量保证人员，产品经理或者CEO，CIO们也可能对本文感兴趣。
Others, including developers, quality assurance personnel, product management and CEOs/CIOs may find interest.
系统的分析人员、测试人员和质量保证人员能够在系统被完成之前利用模型分析系统和系统的性能。
System analysts, testers, and quality assurance staff can leverage models to analyze the system and its performance before the system is complete.
很有可能的是，如果项目在所有的范围内，并且准时，在预算之内交付，但没有达到所有的质量标准，没有一个人会希望如此，质量保证人员也认为项目是失败的。
And it is likely that no one except a QA person would consider a project a failure if it delivers on all its scope on time and within budget but does not meet all quality criteria.
很有可能的是，如果项目在所有的范围内，并且准时，在预算之内交付，但没有达到所有的质量标准，没有一个人会希望如此，质量保证人员也认为项目是失败的。
And it is likely that no one except a QA person would consider a project a failure if it delivers on all its scope on time and within budget but does not meet all quality criteria.
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