When the financial year closes, the same questions come up. Where is our data? Who owns it? What is enough for the auditor, your customers and the bank? Many companies answer them with a last-minute push in Excel, even when they've reported before.

That's why we created Sustainability Reporting 1-2-3. It's a 12-week workbook for sustainability managers, CFOs and finance managers in mid-sized companies, built around three steps: map, collect and prove. Every week has a worksheet to fill in, with checklists of what works and what fails, and notes on where spreadsheets usually stop working.

Start in early November and you'll have a complete, auditable dataset by the end of January, when audits and annual reports usually begin.

Fill out the form to download your copy.