Choose one recurring business event: a new enquiry, signed order, completed job, supplier renewal, or overdue invoice. Write down the intended result. Then inspect the handoffs between them.
A likely leak has at least one of four signatures: nobody owns the next action; no due action exists; exceptions have no destination; or the system’s completion state cannot prove the real result. Sample actual records before estimating scale.
Do not multiply a suspicious count by headline revenue. First separate enquiries from qualified opportunities, bookings from attended appointments, and revenue from contribution.