An action scene can become difficult to follow even when each sentence sounds clear. A rough floor plan exposes movements that the prose may have accidentally made impossible.
Draw only the necessary space
Mark entrances, obstacles and the people whose positions affect the action. Use boxes and initials; this is a working diagram, not an architectural drawing. Follow the scene sentence by sentence and move each person when the prose moves them.
Watch for a hand reaching an object across a room or a character blocking a doorway they never approached. These may be simple continuity slips rather than problems requiring a new plot.
Add the smallest useful bridge
Repair the movement with one clear action where possible. “She crossed behind the table” can establish a route without narrating every footstep. Keep only spatial information the reader needs to understand the choice or consequence.
After revising, put the sketch aside and read the prose alone. The scene should carry its own geography without requiring your private map. This pass is especially helpful when several people act quickly: accurate relationships can make the writing feel more immediate while reducing the amount of explanation.