Definition
Overall cycle time is the real, average time it takes to produce one shot in actual production — including everything that happens between consecutive parts, not just the machine's ideal Molding Cycle. Where Cycle Time usually means the clean, repeating machine cycle, overall cycle time is the figure you get by dividing real run time by parts made, so it captures the losses the nameplate cycle ignores.
What it includes beyond the ideal cycle
- The machine Molding Cycle: fill, pack/hold, Cooling Time, Recovery, mold open, Part Ejection, mold close.
- Operator/automation time: extra seconds in a Semi-Automatic Cycle for the operator vs a fully Automatic Cycle; insert loading, gate cutting, inspection.
- Micro-stops and variation: door interlocks, alarms, slow part drop, robot handshakes — small delays that don't show in the "ideal" cycle.
- Allocated downtime: depending on definition, brief stoppages and the amortized share of changeovers or Scheduled Stops.
Ideal vs overall
- Ideal/machine cycle: the best repeating time the press achieves running clean and automatic.
- Overall cycle time: actual output rate, always ≥ the ideal — the gap is the improvement opportunity.
This distinction matters for costing and capacity: quoting on the ideal cycle but running at a longer overall cycle is how a job loses money. Reducing it means attacking the losses (automate the Semi-Automatic Cycle, cut micro-stops, speed handling) as much as the machine cycle itself.
Why it matters
Overall cycle time is the honest basis for capacity planning, machine-hour cost and OEE performance: it ties the theoretical cycle to what the cell really delivers per hour and per shift.
Related terms
- See also: Cycle Time, Molding Cycle, Cooling Time, Automatic Cycle, Scheduled Stop
What is overall cycle time in injection molding?
The real average time per shot in production — the machine molding cycle plus operator/automation time, micro-stops, handling and allocated downtime — found by dividing actual run time by parts produced.
What is the difference between cycle time and overall cycle time?
Cycle time usually means the clean, repeating machine cycle; overall cycle time is the real average including operator time, micro-stops, handling and small losses, so it is always equal to or longer than the ideal cycle.
Why is overall cycle time important for costing?
Because quotes and capacity must be based on the real output rate, not the ideal machine cycle; if you price on the ideal cycle but actually run a longer overall cycle, the job runs over budget.