A health status index model using a fuzzy approach
European Journal of Operational Research
Sekita, Y., & Tabata, Y. (1979). A health status index model using a fuzzy approach. [Journal Article]. European Journal of Operational Research, 3(1), 40-49. doi: http://dx.doi.org/10.1016/0377-2217(79)90048-1
In order to derive an operational health status index, it is necessary to develop the concept of health status. An individual belongs to one of several alternative health statuses, but it is difficult to clearly identify which, because the boundaries of statuses are not sharply defined. In this paper a fuzzy approach is proposed for use in expressing the health status and its index. We deal with health status as an intrinsically ambiguous and multi-dimensional expression which is determined through some subjective judgement. We introduce the concept of fuzziness and fuzzy set in order to study the ambiguous health status. Some concepts and properties of group fuzzy measures are clarified so that we may obtain the common measure to express the health statuses. Two examples using the researched data are presented for explaining the concept of health status, the group fuzzy measures and the health status index model.