## 2 Literature Review  
This study investigates assembly line feeding methods and material feeding method selection problems in the literature. In many studies in the literature, material feeding methods are compared with each other, and various methods are used to solve the material selection problem. In this section, different material feeding methods in the literature are explained. Just-in-time production, line-side stocking, kitting, Kanban, sequencing, and hybrid material feeding methods are mentioned in the literature. In the articles, line-side storage, kitting, and just-in-time production material feeding methods are mostly mentioned [8]. There is an urgent demand to improve the material feeding performance in automobile mixed-model assembly lines [9]. For automotive mixed-model assembly lines, the excessive work-in-process inventory will cause confusion in the assembly line, which will damage the product quality and reduce the enterprise's reputation [9]. [PERSON] and [PERSON] [9] proposed a fuzzy-neural model-based model for the material feeding problem for the Kanban strategy. The fundamental principle of the material feeding strategy is the determination of whether the supply of materials is continuous or discontinuous [10]. As an alternative to kitting, the Kanban method is a continuous supply strategy that allows a stock of each needed part type to be continuously held at the workstation with small-sized containers. Conversely, when substantial quantities of parts are stored in larger containers along the production line, and these containers are replenished at regular intervals, this is referred to as line storage [10]. Kitting is the feeding of multiple specific parts required at a specific workstation for the production of a specific product [11]. [PERSON] and [PERSON] [12] established the definition of \"Kanban\" as a material flow-control mechanism. This mechanism is employed to regulate the appropriate quantity and temporal allocation of products, ensuring that only the necessary quantity is produced. In a Kanban material feeding system, each bin is associated with a card containing information about the product. Kanban cards always move through the processes together with the products. The Kanban card refills stations with relevant parts based on consumption [13; 14]. The Kanban material feeding method reduces inventory costs, increases flexibility as production occurs in line with customer demand, and does not require an additional management system [15]. The Kanban system has been demonstrated to exhibit a high degree of adaptability in responding rapidly to fluctuations in demand [9]. Line-storage feeding is considered to be the process of moving parts from a central warehouse to an area in which they will be utilized. Parts are stocked in the relevant area, and when the operator on the assembly line requires material, it is obtained from the stock areas adjacent to the line. Conversely, when a specific component is no longer required, or the designated parts bin is depleted, it is returned to the central warehouse, thereby freeing up space in the line-side stock area [16]. This systematic approach ensures the continuous availability of materials in the stock area adjacent to the assembly line. In the automotive industry, line-storage feeding is the most common parts feeding strategy due to its simplicity and the low material handling efforts it entails [17]. However, this approach is associated with higher space utilization and no time savings during the assembly worker's picking process [18]. Kitting is collecting the parts required to produce a specific product in the required quantity and bringing them to the assembly line in a designated box [16]. The time needed to prepare the kit is non-value added time; additional space is needed to prepare the kit, the list of materials needed must be shared with the kitting operators in advance, and additional planning is required. Handling is high and risky for parts that may suffer quality damage or be stolen.