Determines the Weight Criteria of Simple Additive Weighting Method Using Certainty Factor

Simple Additive Weighting is a method of decision-making that is widely used because the calculation process using the simple steps in problem-solving. This method works by summing the weights of each criterion for selecting the best alternative from several alternatives based on criteria that have been determined. Where each criterion consists of several sub-criteria which has a weight of each in the form of crisp or fuzzy numbers. In this study, the weight of each decision-making criteria determined using the Certainty Factor method by combining the value of the measure of belief and measure of disbelief in numbers form. The value is derived from the assumption of of the level of belief and disbelief on a hypothesis based on evidence. By using the Certainty Factor as a determinant the criteria weight for decision-making has produced in the value of preferences the more detailed and varied. The combination of these two methods can be used to perform the selection of the best alternative from the several alternatives that have almost similar values.