Final answer:
The referenced excerpt from Hilda's document represents the step outline stage of screenplay development, which focuses on organizing the story's structure before writing the full screenplay.
Step-by-step explanation:
The excerpt in question is suggestive of a stage in screenplay development where the writer is considering the structure, plotting, and organization of their story. With the mention of using graphic organizers, reverse-engineering the script's structure, focusing on drafting with regard to conflict and plot diagram, and the importance of an outline, this stage is most akin to the step outline.
This is not the final screenplay but a more detailed outline of the scenes and the flow of the narrative, offering the screenwriter a clear path from the start to the end of the story. This stage is crucial for planning the screenplay before moving on to writing the full script.