El Assad, N., Mokhlis, S.- eddine, El Haouti, K. and Messaoudi, N. 2026. Development of a lead-time-first multi-level planning approach for CTO/ATO mass customization supply chains. Eastern-European Journal of Enterprise Technologies. 1, 3 (139) (Feb. 2026), 48–60. DOI:https://doi.org/10.15587/1729-4061.2026.345253.