In a continuous flow or single piece flow environment $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_?$

production flows immediately to the next activity with minimal storages or work$-$in$-$process inventories.

production flows to the next activity as based on the Takt Time calculation.

each batch is created to flows to the next upstream activity with minimal delays, storage or work$-$in$-$process.

each piece is created to flow immediately to the next activity with no delays, storages or work$0$in$-$porcess inventories.