Initial Analysis of a complex situation is one of the most vital phase in inventive design. To ensure an exhaustive and formal method to draw a knowledge representation model, a problem-graph is proposed. However, one of the criticisms often leveled is that the application of these methods is time-consuming. For this reason, the Inverse Problem Graph method was introduced to increase the agility of the inventive design process through the beginning of the problem formulation from an initial problem, located in the lower level of a problem situation. Nevertheless, the way designers should select the most important initial problem among the others is not treated. The purpose of this article is to integrate a Failure Mode Effect Analysis (FMEA) based method into the IPG method in order to prioritize the initial problems in the initial analysis phase. The capability of the proposal is finally tested through its application in a case study.