When shooting a film, why is it important to save inserts for the end of the day?

Saving inserts for the end of the day is important primarily because inserts require more time and attention to detail. Inserts often involve close-up shots or specific details that are crucial for enhancing the narrative but can be more complex to execute. These shots typically demand meticulous framing, lighting adjustments, and a higher degree of concentration from the crew and the director, which can be better managed when the bulk of the main scenes—where actors and primary setups are frequently rotated—have already been completed. By prioritizing the main shots first, the production team can lay a solid foundation for the day's filming, ensuring that everyone is warmed up and in sync. This way, when the crew turns to the inserts, the focus can be solely on achieving the best possible quality for these more intricate shots without the pressure of also needing to set up extensive scenes.