## 1 _Article_  
CAD-MBSE Interoperability for the Checking of Design Requirements Based on Assemblability Indicators  
[PERSON] 1,2,*, [PERSON] 1, [PERSON] 2, [PERSON] 1 and [PERSON] 2  
The search for the right compromise between cost, quality and production time has led researchers to better contribute to technological development. This in turn led to the development of highly complex systems [1]. Among them we can cite mechanical systems. Their complexity appears not only in the complexity of parts but also in the difficulty of finding the most optimal assembly sequence that leads to a highly quality of the product. The accumulation of all these requirements from different fields makes the task of validating the final product more difficult. For this reason, good collaboration between all disciplines is essential [2]. This concentration of efforts helps to produce valid systems that strive for perfection [3]. Model-Based Systems Engineering (MBSE) is a multi-disciplinary approach that facilitates the exchange between different domains to validate systems design [4]. SysML is one of the languages used by System Engineer (SE) to document requirements in order to describe the overall solution in a simple and efficient way [5]. Thus, the MBSE approach using Systems Modeling Language (SysML) is a good choice for system design to better manage all the constraints [6,7]. Currently the problem is how to ensure the exchange of data between the SE, who has a global view of the product, and the designer, who is a Computer Aided Design (CAD) specialist, in order to validate the design solution of the mechanical assembly and to define the most appropriate assembly sequence that allows for a better quality. Several research works focused on the development of MBSE and CAD. However, little works treated the interconnection between these two engineering domains to assess the response of mechanical systems by involving SE in the choice of the design solution [4]. Indeed, to solve the problem of the assembly sequences generation, researchers initially relied on the philosophy of determining disassembly sequences. The assembly plans are considered, thus, as the reverse order of the disassembly sequences. However, this philosophy has met with many counter examples [8]. Therefore, the second philosophy focuses on the determination of assembly plans directly without going through the reverse path. [PERSON] is considered the first to develop an approach for determining all possible assembly sequences of a product [9]. Other researchers generated the assembly sequences based on a simplification of the assembly model by eliminating the connecting parts [10; 11]. There is also [PERSON] who proposed an approach that allows the generation of a single assembly sequence by respecting the following criteria: the trajectories of the operation, the handling of the component, and the tools used for the assembly [12]. The generation of assembly sequences is certainly an important step in the development phase of mechanical systems, but it is always necessary to choose the most optimal sequence to ensure proper operation and better profitability of the system. To this end, Design For Assembly (DFA) methodologies have been very successful in improving product assemblability [13]. In the literature, several DFA methodologies have been studied but the most extensive are those of [PERSON] [14], [PERSON] methodology [15], Modified Westinghouse methodology [16], and Hitachi-AEM methodology [17]. Other research studies have combined the 4 methodologies mentioned above to come up with a methodology that allows the product development method to be reinforced in all phases of the design process [18]. However, these methodologies do not allow the study of product design problems at the beginning of the product life cycle, so researchers have proposed new analysis indicators to determine the correct assembly sequences from a ranked list [19]. In the same context, a new approach using essential metrics to define optimal assembly sequences were developed [20].