Effective method
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An effective method for a class of problems is a method which, if followed rigorously, and as far as may be necessary, is logically bound to always give some answer rather than ever give no answer; always give the right answer and never give a wrong answer; always is completed in a finite number of steps, rather in than an infinite number; for all inputs, and for all problems of the class; for which each step in the method may be described as a mechanical operation.
Another sense of the term may include the qualification that when given a problem from outside the class for which the method is effective, the method may halt or loop forever without halting, but must not return a value as if it were the answer to the problem.
See also
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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
