## 1 Classification key for CSs
#### 4.4.4. SoS G-QMS CORE  
In the results presented in Figure 2, the independent category [8.3] with SiTotal = 10.49 underscores the pivotal role of the SoS G-QMS CORE entity within the G-QMS in SoS model. This high index value underscores the entity's central importance and its recognition across all the clusters, particularly by the G-QMS CORE and QMSs clusters, which contribute at a rate of 45.1% and 23.9%, respectively. This parallels the emphasis placed in the G-QMS CORE category as well as in the second model [2]. The SoS G-QMS CORE head is the chief quality manager for the SoS project and a member of the SoS project chief management team. The main aspects identified for this entity are as follows:  
1. _SoS G-QMS CORE head shall be a persona with high professionalism and authority_: This is a necessary condition, aligning with findings related to the G-QMS CORE in the model of the first supra entity [2]. This position demands not only expertise in quality management but also a deep understanding of the product and technology. Field data suggests a scarcity of professionals with the requisite expertise for such roles even at the lower levels of systems, particularly at the level required for leading the SoSG-QMS CORE. In addition to these, the added value of the SoS G-QMS CORE is in being a comprehensive ensuring management factor, necessitating a broad systems perspective and the ability to manage transdisciplinary systems effectively. 2. _SoS G-QMS CORE role perception_: The role of the SoS G-QMS CORE lacks clear guidelines within the current QMS standards and literature, leading to varying perceptions of its responsibilities across different projects. This field study points out the existence of different perceptions, shaped by the unique characteristics and factors of each SoS project, and by the influence, often limited, from the infrastructural G-QMS CORE of the G-QMS of Org. of SoS model. This study proposes a role perception for the SoS G-QMS CORE as an integral part of the SoS project's chief core management team. Similarly to the chief project manager and SoS engineering, this position is _comprehensive and systemic._ However, unlike the comprehensive implementing role of SoS engineering, the SoS G-QMS CORE is a _comprehensive ensuring_ role that does not in the execution functions. The scope of this assurance role can vary widely, subject to interpretation. This research suggests viewing the SoS G-QMS CORE and generally the G-QMS in SoS as a support and assistance body, particularly with the authority to approve exceptions within the bounds of regulatory, standard, and client requirements. It emphasizes the promotion of quality management principles such as risk-based thinking (see ISO9001 [5] and other standards), especially a body that should be seen as a resource that _contributes_ to the project's success rather than hindering progress. 3. _SoS G-QMS CORE role positioning_: Quality management in SoS projects needs further enhancement, and it is suggested that the SoS G-QMS CORE be posited as a core element of the SoS project's chief management trio. The Positioning of the comprehensive systemic management that consists of the Chief SoS Project Manager, who oversees the overall project management; the Chief SoS Engineering, responsible for product and technology aspects; and the Head of SoS G-QMS CORE, who focuses on assurance and control, is depicted in the proposed structure in Figure 7. 4. _SoS G-QMS CORE main functions_: Primarily, the SoS G-QMS CORE is the focal point for quality management interactions with the client, stakeholders on his behalf, SoS project administration, and its chief project manager. It is tasked with overseeing all the aspects of quality management dictated by client contract requirements, regulations, and standardization norms. Additionally, it is responsible for formulating the policy and strategy for all the quality management processes within the G-QMS in SoS.