Abstract
In a project to use COSMIC method for a scale measurement, there is the case which you must measure when there is not enough information. In this case the early & approximate estimation is necessary. If it is the project that it uses IFPUG method for, I can use NESMA method. Because there was not suggestion of the early & approximate estimate technique based on COSMIC method in Japan I did not understand what kind of technique I should have estimated it. In this report I suggest an application method to incomplete definition of requirements in the project to use COSMIC method after I introduce the early & approximate estimate technique based on COSMIC method suggested so far, and having surveyed it.
