Final answer:
Smaller batch sizes lead to faster system speed and lower variability, aligning with principles of lean manufacturing and just-in-time production. Larger batches can result in increased delays and inconsistencies in processing times.
Step-by-step explanation:
If small batches go through the system faster with lower variability, then the statement that is true about batch size is that smaller batch sizes result in faster system speed and lower variability. This principle is often associated with the concepts of lean manufacturing and just-in-time production where smaller batches are processed to improve efficiency and reduce waste. A smaller batch size means that products can move through a system more quickly and consistently, leading to faster system speeds and more predictable processing times, hence lower variability. Larger batch sizes may lead to increased handling time, longer queues, and greater complexities that can result in delays and inconsistencies.