"When accountability is unclear, performance follows incentives instead.
In a simplification that makes one dashboard look better, the room keeps asking for one more datapoint, as if it will remove responsibility. Meanwhile the calendar keeps committing you.
If you do not write the decision, you do not avoid it—you postpone it until the worst moment. You see it in a shortcut that becomes the new operating mode, when execution interprets the boundary differently than you meant. Make the signal observable, not philosophical, so you can act without debating intentions. Make the boundary explicit enough that a peer could disagree with it; if no one can disagree, no one can defend it under pressure.
State the win you are buying and the cost you are taking on, so it cannot hide inside execution. That is what makes execution calmer. Let others hold you to it.