A Model-Based Aircraft Function Analysis Method: From Operational Scenarios to Functions Yuchen Zhang and Raphael Faudou 1 Introduction In this paper, a model-based function analysis method is introduced. The main goal of the method is to work as a supplement to the existing function analysis method, improving the shortcomings of IDEF0, such as lack of guidance for top level function identification, lack of early validation with stakeholders because of the implement-specific functions decomposition. The method in this article learns from scenario analysis in software engineering, and provide a model-based method for the elicitation of implement-independent high level functions from operational scenario. This paper is organized as follows. Section 1 describes the background and current problems. Section 2 introduces function-behavior transformation, the basic principle used in the method. Section 3 describe the method, and in Sect. 4 an application of the method on a UAV is presented. 1.1 The Need for Functional Analysis Function analysis is one of the most essential processes in aircraft development and is required by applicable standards, such as ISO/IEC/IEEE 15,288 [1] and ARP 4754A [2]. According to the R-F-L-P development process [3], function analysis is Y. Zhang (B ) Aviation Industry Development Research Center of China, No. 14 Xiaoguan Dongli, Chaoyang District, Beijing, China e-mail: zhangyc082@avic.com R. Faudou Samares-Enginnering, 31700 Blagnac, France e-mail: raphael.faudou@Samares-Engineering.com © The Author(s), under exclusive license to Springer Nature Switzerland AG 2021 D. Krob et al. (eds.), Complex Systems Design & Management, https://doi.org/10.1007/978-3-030-73539-5_4 41