Yes, to a large extent. Most activity data from a Bilan Carbone® (kg of materials, kWh, tonnes of products, km, m³) can be reused directly for OEF: what changes between a Bilan Carbone® and an OEF is not the activity data, but the impact factors applied (a single climate criterion vs 16 EF 3.1 criteria). The additions specific to OEF are marginal: a few sectoral indicators (precise types of raw material, a few pollutant flows) that were not essential for Bilan Carbone®. In practice, 80 to 90% of the collection is shared between the two formats.
Read the source article: Bilan Carbone® or OEF: differences and when to switch