There are 3: keeping up with methodological changes, prioritising scope 3 and interpreting the results. The Bilan Carbone® V9 method has applied since 1 January 2025 and Base Empreinte is updated 2 times a year; an assessment based on an outdated version is rejected by a statutory auditor or a demanding client. For scope 3, you need to know which categories to handle using physical data, which using monetary ratios, and which to exclude with justification. Finally, a team that has just spent weeks collecting data often lacks the perspective to build the action plan.
Read the source article: Doing your own Bilan Carbone®: tools, time, limits