Substantive editing and developmental editing are often used interchangeably, but they are not exactly the same thing. Both are important stages in the editing process, but they focus on different aspects of a work.
Substantive editing, also known as comprehensive or structural editing, focuses on the structure, content, and style of a piece of writing. This type of editing involves revising and reworking the manuscript to improve its clarity, coherence, and overall effectiveness. During substantive editing, the editor may suggest additions, deletions or rearrangement of text, to improve the flow of the narrative or to make certain points stand out. The editor might also work with the writer to refine characterizations, ensure consistency of voice, and ensure that the reader's engagement is held constantly throughout the work.
Developmental editing, on the other hand, primarily focuses on the idea and concept behind the work. It involves providing feedback to the author on the story, plot, characters, or theme of the manuscript. The goal of developmental editing is to help the writer develop and shape their ideas, and to guide them in bringing out their vision. The editor may offer suggestions to strengthen the plot or character development, analyze the themes and motifs, and identify gaps or inconsistencies in the story.
In summary, while both substantive and developmental editing aim to improve the overall quality of a manuscript, they do so in different ways. Substantive editing is concerned with polishing and refining the work for clarity and coherence, whereas developmental editing aims to help the writer shape their ideas and develop the manuscript. Both are critical stages in the editing process and should be considered equally important if you want to create an exceptional piece of writing.