The e xpert systems can serve as a consultant that? gives advice to the users? and? at once as an assistant to the experts.?One way to cope and help detect the risk level of? one’s? coronary heart? disease, is to create the expert system as media of? consulting and monitoring a person so that can minimize the occurrence of heart attacks resulting in death. The Dempster-Shafer?method is?non monotonis?reasoning method is used to look for inconsistencies due to addition or reduction of new facts that will change the existing rules, so that the?Dempster-Shafer?method enables one safe in doing the expert work.?This research aims to apply the?Dempster-Shafer?uncertainty methods in expert system to diagnose the risk level of one’s coronary heart disease based on factors and symptom of coronary heart disease ?The benefits of this research was to know the accuracy of? Dempster-Shafer?inference?engine. The diagnosis? results of? coronary heart disease? is? generated? by an expert system similarly with manually calculating result using the theory of Dempster-Shafer?inference?engine.?Therefore we can conclude that the expert system that has been built can be used to diagnose Coronary Heart diagnosis. ?.
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