Five fields, no account. At the end, the questions a manager will ask.
A single achievement — the one you would have to defend.
2-3 sentences: the organization, the mandate, the starting situation.
1-2 sentences. Not your job title: what you decided, and what others did.
2-3 sentences: what did not work, and why.
1-2 sentences. Where the figure comes from matters as much as the figure.
1-2 sentences: what you would do differently.
All five fields are required — start with whichever you like.