Value Analysis (VA) is a collaborative method that could be used to make decision-making in complex projects. System Engineering (SE) is a design method used in complex projects. In complex projects, stakeholders are multiple and carry specific technical, social and environmental expectations that define the value of the project. The aim of this paper is to demonstrate that VA and SE are two complementary approaches to collect and analyze Stakeholders’s expectations in a complex project. The paper presents a literature review on VA and SE that show the complementarity of the methods to involve Stakeholders in projects. From this analysis,a case study is proposed to illustrate the complementarities of the method. The paper concludes that the two methods VA and SE can be combined to analyzeand track multiple dimensions of value (economic, social and environmental) within a complex project.