In quality assurance, tweaking is the process of making subtle variations in the environment in which a program is tested in order to produce unanticipated behaviors. Such tweaking can involve system configuration, hardware configuration, unusual system conditions (e.g. heavy traffic, memory shortage/availability conditions, physical resource shortage/availability conditions, simulated and actual virus attacks, unusual message input, unusual message input node, loss of signon status), and other relevant but low-probability situations which may not have been anticipated by the designer or developer.
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