Hidden cost
A project that is not co-designed generates 18 to 25% of post-delivery modifications according to <a href="https://www.arseg.asso.fr/" rel="noopener" target="_blank">ARSEG</a>. For a 850 m² fit-out, that represents 40,000 to 80,000 euros of rework (rewiring, relocated partitions, reassigned furniture). The overall timeline is then extended by 4 to 8 weeks.