A comprehensive guide for manufacturing managers who want to push beyond the limits of MRP II. Real-time capacity management, theory of constraints, and ERP integration.
MRP II (Manufacturing Resource Planning) revolutionized production planning in the 1980s. However, in the 2026 environment dominated by dynamic supply chains, order variety, and inventory optimization pressure, the classic MRP II engine alone is insufficient. Modern ERP systems preserve the strengths of MRP II while closing its gaps.
Key Limitations of MRP II
- Infinite capacity assumption — ignores existing machine and labor constraints
- Static production times — does not reflect real-time machine OEE
- Batch processing delay — updating plans can take hours or days
- Weak resilience to supplier variability — single-level calculation is insufficient
What Modern ERP Adds to MRP II
- APS (Advanced Planning and Scheduling) engine — constrained capacity planning
- Real-time OEE tracking and dynamic rescheduling with IoT sensor data
- Multi-level BOM explosion with consolidated supplier lead time analysis
- Scenario simulation — parallel plan comparison for "what-if" analyses
- Real-time WIP (Work-in-Progress) visibility and bottleneck alerts
SectionERP's APS module combines classic MRP II outputs with constrained capacity planning, delivering an average 23% shorter production cycle time (2025 customer data).
Tags
MRP IICapacity PlanningManufacturing
