Planning horizon
ERP/MRP typically works at a longer horizon using demand, inventory, lead times and material requirements. Advanced planning and scheduling systems may add finite-capacity logic.
Dispatch list
MES can translate released work into an executable queue for a line or resource, applying local eligibility, material, tooling, quality or setup constraints.
Execution feedback
Actual cycle times, downtime and completions create feedback that can improve future scheduling assumptions.
Resequencing
Operational resequencing may be necessary when equipment, material or labor availability changes. Governance should define which system and role is allowed to make that decision.
MES terminology and boundaries vary among plants and vendors. Validate data ownership, safety impacts, interfaces and change control against your actual manufacturing architecture and approved procedures.