📌 What is Classic Planning?

Classic Planning = traditional MRP (Material Requirements Planning) run in PP.

• Infinite capacity → system plans material needs without checking resource limits.
• Focus: long-term, high-volume planning.
• Typical Tcodes: MD01N, MD02, MD04.

✔️ Example: Create planned orders for all demands — even if machines are overloaded.

📌 What is PP/DS Planning?

PP/DS (Production Planning & Detailed Scheduling) = advanced, constraint-based planning.

• Finite capacity → considers real resource limits and sequences.
• Uses advanced heuristics, pegging, and scheduling.
• Embedded in S/4HANA since 1610 — no separate SCM system.
• Tcodes: /SAPAPO/CDPS0 (Planning Board), /SAPAPO/RRP3 (Product View).

✔️ Example: Schedule orders realistically, avoid bottlenecks, optimize machine use.

📊 Key Differences

Classic PlanningPP/DS PlanningInfinite capacityFinite, constraint-basedLead time schedulingDetailed sequencingBasic peggingDynamic peggingSimple heuristicsAdvanced heuristics, optimizerGood for long-term planBest for short-term, critical products

✅ When to Use Each?

• Classic MRP → fast, high-level planning for all products.
• PP/DS → for bottleneck resources, tight schedules, priority products.

Many companies run hybrid planning: MRP for rough-cut, PP/DS for detailed feasible plans.

📂 Useful Tcodes

• Classic MRP: MD01N, MD04
• PP/DS: /SAPAPO/CDPS0, /SAPAPO/RRP3

✅ Conclusion

Classic Planning is quick and simple — good for bulk planning.
PP/DS Planning adds realism — ensuring production plans fit actual resource availability.
Together, they help companies balance speed, accuracy, and feasibility.