Method for estimating main cause of technical problem and method for creating solution concept for technical problem

摘要

Functions of a whole technical system are regarded as a single conversion process in which an input is converted into an output. The conversion process is observed according to condition changes and divided into plural sub-processes. A phenomenon in each sub-process is analyzed and the sub-process in which the technical problem is occurring is estimated. Thereafter, the main cause of the technical problem is estimated with reference to a technical problem classification system list in which various technical problems are classified and their main causes are systematically organized. Under assumption that the technical system in an ideal state has no technical problem, a solution concept to the technical problem is created is created by finding means for reducing a value in the item selected from the technical problem classification system list to zero.