Rough-Cut Capacity Planning (RCCP): A Practical Guide

Key takeaways

• Rough-cut capacity planning (RCCP) is a mid-level check that validates the master production schedule against a few key resources before you commit to it.
• It sits between high-level sales and operations planning and detailed, finite scheduling.
• RCCP catches obvious overloads early, when they are cheap to fix, instead of on the floor.
• It looks only at critical resources, so it is fast and approximate by design.

Rough-cut capacity planning answers a simple question: is the master production schedule even feasible on our key resources? It is deliberately approximate, trading precision for speed so planners can catch big problems before detailed scheduling.

What RCCP does

RCCP takes the master production schedule (MPS) and checks it against a handful of critical resources: usually bottleneck machines, a key skilled crew, or a constrained supplier. It converts the planned output into a load on each resource and compares that load to available capacity, period by period.

It does not schedule individual operations or worry about every work center. The point is to confirm the plan is roughly achievable, not to produce an executable schedule.

Where it fits

RCCP is the middle layer of capacity planning. Above it, resource planning validates the long-range sales and operations plan. Below it, capacity requirements planning and finite scheduling work out the detailed, machine-level load. RCCP is the fast sanity check on the MPS in between.

A worked example

An MPS calls for 2,000 units next month. The bottleneck press runs at 100 units per shift and the plant has 18 shifts available, giving 1,800 units of capacity. RCCP immediately shows a 200-unit shortfall on the one resource that matters, so the planner can add a shift, move volume earlier, or adjust the MPS now, weeks before the order ever hits the floor.

Detailed scheduling would have found the same problem, but later and at higher cost. RCCP surfaces it in minutes.

RCCP at a glance

• Input: the master production schedule.
• Scope: a few critical resources, not every work center.
• Output: a load-versus-capacity check by period.
• Purpose: confirm the MPS is feasible before detailed planning.

Where OEE fits

RCCP is only useful if the capacity it assumes is real. If the bottleneck press is rated for 100 units per shift but real OEE delivers 75, the rough-cut check is optimistic and the plan looks feasible when it is not. Using measured capacity from each critical resource makes RCCP trustworthy.

Book a Fabrico demo to see how live OEE data feeds capacity planning. For the detailed layer below RCCP, see finite-capacity scheduling .

Common mistakes

• Checking every resource. RCCP loses its speed advantage if you model the whole plant; stick to the true constraints.
• Using nameplate capacity. Rated speeds hide downtime and quality loss, so the check looks better than reality.
• Treating RCCP as a schedule. It validates feasibility; it does not sequence the work.

Frequently asked questions

How is RCCP different from capacity requirements planning?

RCCP checks the master schedule against a few key resources and is fast and approximate. Capacity requirements planning is detailed, covering all work centers using the full material plan, and is slower but precise.

How many resources should RCCP include?

Only the critical few that actually limit output, typically the bottleneck plus one or two constrained resources. The whole value of RCCP is staying fast.