A production job lot refers to a batch or group of products that are manufactured together in a single production run. This strategy is used in manufacturing to optimize production efficiency, reduce costs, and improve quality. Instead of producing individual parts, lots are launched, which are a mix of different types of parts. Lot splitting techniques can be used to split a lot into smaller transfer lots, which can be transferred to the next operation immediately upon completion. Using transfer lots can reduce manufacturing lead times and work-in-process inventory levels. Scheduling job shops with transfer lots can be done using integer programming formulations and optimization-based solution methodologies. The objective is to achieve on-time delivery of products and low inventory levels. Various algorithms, such as Lagrangian relaxation, dynamic programming, and heuristics, can be used to solve the scheduling problem. Production job lots are typically used for mid to high volume products with long setups.