This ES will employ decision tree approach in knowledge base representation [11]. The decision tree approach itself is basically a collection of nodes that are connected each other. These nodes are categorized as root node, decision node, and leaf node. The root node represents first fact that will be an initial point where seeking process for identifying emerging symptoms is started. This identification will provide options to walk through other branches into other nodes, either decision node or leaf node. The decision node owns identical purposes with root node, but it is not located in the initial position. Leaf node is particularly a node that marks the ending position of a tree. This leaf node must be a decision that points to a particular solution.