Abstract
CFP is the measure of the functional size by the COSMIC method. When we measure the functional size by the COSMIC method, we count a number of the input and output that is must use logically to realize a function. We usually measure using the functional user requirement that extracted a functional requirement from a definition of requirements and/or software specifications. It is necessary to estimate behavior of the software at the stage identifying input and output. This estimate is easy to become different by personal experience and skill. Therefore not only an error of the measurement is easy to occur, but also makes measurement takes itself a troublesome one. In this paper, I suggest a method to measure the function point by the CRUD matrix and some additional information. It is hard to produce the error and it is easier and can measure surely.
