This paper presents an overview of each of the existing Decision Intelligence techniques, and explains the basic concept of the author’s proposing Naturally Decision Intelligence (NDI). The metaphysical perspective on the synchronous nature of life activities serves as the basis for this algorithm generation method. Naturally Decision Intelligence is a true decision-making method with synchronization that conforms to the human way of thinking. The author hopes to realize a new discipline based on NDI, synchronizing various scientific theories. In particular, this paper explains one feature within NDI, the mechanism for obtaining a legitimate solution from requirements from the perspective of decision-making technology.