*4.2. Data Collection*

The procedure for the case selection was as follows: Korea's rebar production plant in Anseong, Gyeonggi-do, was chosen for model development, and a visit there was planned. With over 100 building sites in its delivery history, this plant can be considered to have a solid process. We then described the machine. The elements appropriate for the underconsideration situation were found among the different machine-specific characteristics of the rebar fabrication process described in the preceding section. Table 3 provides a summary of the characteristics of the hoists, cutters, and benders employed as resources in the simulation. The machine characteristics that have an impact on the processing times and loss rates were configured as parameters and applied to the simulation model. By adjusting the settings in accordance with the characteristics of each piece of machine, the loss rate and necessary time were discovered. The varieties of rebar required at various places were then identified. Table 4 provides a summary of the information introduced in the simulation of the rebar fabrication process based on the data of the real rebar length and number of cuts.


#### **Table 3.** Machine features.

**Table 4.** Rebar types for each site.

