An assembly buffer refers to a designated storage area or buffer zone where components, parts, or materials are temporarily held before being used in the assembly process. It is a strategic location within the production line that ensures a continuous flow of materials and allows for efficient assembly operations. The assembly buffer helps to prevent disruptions caused by delays in the supply chain or fluctuations in production rates. By maintaining an adequate supply of components in the buffer, it enables smoother workflow, reduces waiting times, and helps to optimize overall production efficiency.