The engineering question
Start from a stable recorded cycle, then separate fill, hold, cooling, open/eject/close, and screw recovery. Use a cooling model as a screen, not a substitute for ejection, warpage, quality, or automation validation.
What to document
Cycle improvement changes capacity only when the limiting operation and quality boundary are retained.
Practical workflow
Use Cooling Time, Screw Recovery Time, Parts Per Shift, and Machine Cost Per Part.
Validation boundary
Use manufacturer documentation, grade-specific supplier data, controlled process records, and trials for any equipment, quality, material, or commercial commitment. A static calculator is a transparent starting point, not a simulation or approval.