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LEONATO: O, she tore the letter into a thousand
halfpence; railed at herself, that she should be
so immodest to write to one that she knew would
flout her; 'I measure him,' says she, 'by my own
spirit; for I should flout him, if he writ to me;
yea, though I love him, I should.'—Much Ado About Nothing, II, iii, 150–161
Evaluation is a process in which the evidence for assurance is gathered and analyzed against criteria for functionality and assurance. It can result in a measure of trust that indicates how well a system meets particular criteria. The criteria used depend on the goals of the evaluation and the evaluation technology used. The Trusted Computer System Evaluation Criteria (TCSEC) was the first widely used formal evaluation methodology, and subsequent methodologies built and improved on it over time. This chapter explores several past and present evaluation methodologies, emphasizing the differences among them and the lessons learned from each methodology.
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