Rough-Cut Capacity Calculator

About the Rough-Cut Capacity Calculator

Rough-Cut Capacity Planning (RCCP) is a quick validation that the Master Production Schedule is feasible from a capacity perspective. It multiplies planned production quantities by the standard hours required per unit at each key work center, then compares the total load against available capacity.

RCCP is intentionally simple — it does not consider detailed scheduling or operation sequencing. Its purpose is to catch major capacity overloads before they cascade into detailed planning. If RCCP shows 140% loading at a work center for a given week, the MPS needs adjustment before running MRP.

This calculator performs RCCP for a single work center. Enter the MPS quantity, hours per unit at that work center, and available capacity to see the load percentage and any overload or available capacity gap.

Precise measurement of this value supports data-driven planning and helps manufacturing professionals make informed decisions about resource allocation and process optimization strategies. Quantifying this parameter enables systematic comparison across time periods, shifts, and production lines, revealing patterns that might otherwise go unnoticed in routine operations.

When This Page Helps

An infeasible MPS wastes everyone's time — MRP generates orders that cannot be executed, purchasing orders materials that will arrive but cannot be processed, and the shop floor scrambles. RCCP catches problems early.

How to Use the Inputs

1. Enter the MPS quantity for the period.
2. Enter the standard hours per unit required at the work center.
3. Enter the available capacity in hours at the work center for the same period.
4. View the total load in hours and the load percentage.
5. If load exceeds capacity, adjust MPS quantities or add capacity.
6. Repeat for each critical work center.

Example Calculation

Tips & Best Practices

• Focus RCCP on bottleneck and critical work centers — not every machine.
• Use bill of labor (hours per unit per work center) for accurate load factors.
• Run RCCP every time the MPS changes.
• Present results visually as a bar chart: load vs. capacity by week and work center.
• For mixed products, sum the loads from all MPS items at each work center.
• RCCP is a screening tool — follow up with detailed CRP for confirmed schedules.

RCCP Methods

Three common RCCP methods are: (1) Capacity Bills — multiplies MPS by hours per unit, (2) Resource Profiles — distributes the load across time periods based on lead time offsets, and (3) Overall Factors — uses a single labor-hours-per-unit aggregate. Capacity Bills is the most widely used.

Visual RCCP Reporting

The most effective RCCP output is a bar chart showing load vs. capacity for each week at each key work center. Bars extending above the capacity line are immediate red flags. This visual format makes capacity problems obvious to planners and managers.

Integrating RCCP into S&OP

Sales and Operations Planning (S&OP) meetings should include RCCP validation. Before committing to sales plans, the operations team must confirm that the implied MPS is feasible. RCCP provides the data to make this confirmation or highlight conflicts.

Frequently Asked Questions

• What is the difference between RCCP and CRP?

  RCCP is a quick, high-level check using MPS quantities and aggregate time standards. CRP is a detailed check using planned and released order routing data. RCCP is faster but less precise; CRP is slower but more accurate.

• Which work centers should I check with RCCP?

  Focus on bottleneck operations, expensive equipment, and work centers that historically constrain output. You don't need to check every work center — just the critical few.

• How do I get hours per unit per work center?

  This comes from the bill of labor or product routing. Sum the setup and run time at a specific work center for one unit of the finished product, including any yield loss adjustments.

• What if RCCP shows an overload?

  Options include: smoothing MPS quantities across periods, adding overtime, outsourcing, reducing MPS quantities, or moving some production to under-loaded work centers if alternate routings exist. Comparing your results against established benchmarks provides valuable context for evaluating whether your figures fall within the expected range.

• How far ahead should RCCP look?

  RCCP should cover the same horizon as the MPS — typically 12-26 weeks. Focus attention on the near-term periods (4-8 weeks) where changes are more disruptive and harder to resolve.

• Can RCCP handle multiple products?

  Yes. Sum the load contributions from all MPS items at each work center. The total load at each center must be compared against its available capacity for a complete RCCP picture.