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Calcimator

Capacity Planning Calculator

Determine required machines and shifts from demand forecast, cycle time, and efficiency to meet production targets.

Inputs

units
sec
hrs
%
%

Results

Machines Required

2

Parts per Machine per Year387,600
Total Capacity775,200 units/yr
Capacity Utilization64.5%
Spare Capacity275,200 units/yr
Effective Hours per Machine3,230 hrs/yr
How to Use This Calculator
  1. Enter the number of machines or workstations in the production line.
  2. Set the planned operating hours per shift and number of shifts per day.
  3. Input the planned downtime percentage for maintenance and changeovers.
  4. Review the available capacity in hours and the maximum units per day given your cycle time.
  5. Compare available capacity to the production plan to identify bottlenecks.

What each input means

Annual Demand
Total units required per year.
Cycle Time per Part
Time to produce one part on one machine.
Hours per Shift
Working hours per shift.
Shifts per Day
Number of production shifts per day.
Days per Week
Operating days per week.
OEE / Efficiency
Overall equipment effectiveness or machine efficiency percentage.
Planned Downtime
Planned maintenance and changeover as percentage of scheduled time.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Annual Demand = 500000, Cycle Time per Part = 30, Hours per Shift = 8, Shifts per Day = 2 = 7 input(s) provided
  2. Calculate Machines Required
    Machines Required
    2 = 2
  3. Calculate Parts per Machine per Year
    Parts per Machine per Year
    387600 = 387600
  4. Calculate Total Capacity
    Total Capacity
    775200 = 775200

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