Production capacity; It is the amount of solid product that can be produced in a certain period with the available machinery and working time. Simply multiplying shift hours by the number of machines is not enough. When preparation, adjustment, maintenance, breaks, loss of performance, wastage and quality rejection are not taken into account, the capacity appears higher than it is.
Production capacity calculation formula
First find the available machine time. Divide this time by the cycle time; Achieve plannable capacity by applying performance and solid product ratio.
Basic formula
Plannable capacity = Available time ÷ Cycle time × Product per cycle × Performance rate × Sound product rate
Don't Mix Four Different Capacities Together
Theoretical capacity
It is the highest amount that can be reached, calculated as if there were no downtime or losses.
Available capacity
It is the remaining time after maintenance, adjustment, breaks and other planned stops are excluded.
Plannable capacity
It is the quantity that can be used in the order plan, taking into account past performance and quality rates.
Actual production
It is the amount of actual solid product produced at the end of the period and passed quality control.
How to Calculate Production Capacity Step by Step?
Find gross machine time
Use the formula: number of machines × shift length × number of shifts × working days. If one machine works two shifts per day, each shift 8 hours, five days a week, the gross time is 80 machine‑hours.
Remove planned stops
Deduct maintenance, mold or model replacement, cleaning, break and scheduled meeting times from the gross time. This process gives usable time that can actually be devoted to production.
Convert the cycle time to the same unit
If the available time is hours and the cycle time is seconds, convert the time to seconds. If more than one product is produced per cycle, add the mold size or batch quantity separately.
Apply the actual performance rate
The machine does not always run at standard speed due to micro-stoppage, loss of speed, operator waiting and feed delay. Use actual performance rate from historical production records rather than estimation.
Think of waste and quality loss
The total number produced is not the amount of solid product that can be transferred to sale or subsequent operation. Build the plan based on solid product ratio.
Validate with bottleneck operation
Even if cutting is fast, if sewing or assembly is slow, the capacity of the line cannot be determined by fast operation. The mandatory operation that produces the lowest output limits the total capacity of an order.
Weekly Production Capacity of Two Machines
The two machines operate two shifts per day for 5 days and 8 hours per shift. Let's say the weekly planned downtime is 10 hours, the cycle time is 45 seconds, the performance rate is 85% and the intact product rate is 97%.
Comment: The sales and production plan should be established not on 12,000 units, but on approximately 9,894 solid products under current performance and quality conditions.
Bottleneck Determines Capacity in Multi-Operation Production
cut
120 pieces per hour
assembly
90 pieces per hour
bottleneckPackaging
110 pieces per hour
The capacity of this line is not 120 or 110 per hour, 90 pieces per hour. Producing more in cutting without improving the assembly will cause an accumulation of semi-finished products in front of the assembly. Calculate each mandatory operation the product goes through separately to identify the bottleneck.
What Data Changes in Capacity Calculation According to Sector?
Textiles and shoes
Model, size, number, color, operator skill and operating minutes change the capacity. A single product average should not be applied to the entire collection.
plastic and metal
Cycle time, mold cavity, mold change, tool setting, scrap and first part approval should be evaluated together.
Furniture and made-to-order production
Cutting optimization, machine routing, assembly time, custom dimension and pending project mix affect the capacity calculation.
Most Common Mistakes in Capacity Calculation
The plan cannot be implemented if maintenance, preparation, break and adjustment periods are not deducted.
The slowest forced operation determines the output of the line.
Model, material, size and operation route may change the time.
The amount to be given to the customer cannot be found without subtracting waste and quality rejection.
Unsubstantiated fixed rates make capacity unreliable.
Capacity is the power to produce; The open workload shows how much of this power is full.
Link the account to regular up-to-date data
Capacity table prepared once; remains stale when the machine, shift, product mix or cycle time changes. When work order realizations, downtimes, waste and solid production quantities are recorded regularly, planned capacity can be compared with actual results.
How production capacity is managed together with work orders, material needs and deadlines in the production management guide; Use of production, stock and cost data in a single system KG Palaimon in the production ERP program you can review. For the effect of capacity on the date given to the customer delivery date calculation in production you can go to the article. To determine which point of the line limits the total output Bottleneck detection guide in production you can use
Frequently Asked Questions
How is the capacity utilization rate calculated?
Actual solid production is divided by the plannable capacity for the same period and multiplied by 100. The type of capacity used should be clearly stated in the report.
Does overtime increase capacity?
Can increase workable time; However, the same performance rate cannot be used without taking into account fatigue, loss of quality, maintenance and material constraints.
Can capacity be measured in hours instead of units?
If the product mix varies widely, standard minutes or machine-hours can be used. When moving to the order plan, the product route and standard time must be converted to quantity.
Will buying a new machine solve the bottleneck?
It only solves if the bottleneck is actually on that machine. If materials, moulds, operators, quality or subsequent operation are limited, the investment will not provide the expected increase.
To compare the calculated capacity with actual losses in the OEE guide You can examine the distinction between usability, performance and quality. OEE does not replace capacity calculation.
Let's evaluate your machine, shift and order capacity together
Examine how your current workload, bottlenecks, and actual production records will be reflected in your capacity plan.