The executive summary should provide a snapshop of the key features of the business case, but most importantly it should present a short and compelling argument for the business case, addressing briefly the What?, Why?, and How? of the business case.
- It may be easier to write the Executive summary after completing the rest of the business case
- Conducting an Elevator pitch might help you to identify the the main messages you want to convey. See these example pitches from SPRUCE.