Why the cycle time changes
The first number is an estimate. Modern dishwashers keep recalculating as they measure the load.
Soil sensors
Auto and sensor cycles inspect the wash water and change the number or length of wash and rinse phases.
Incoming water temperature
The machine may pause while its heater brings water to the programmed temperature. Cooler inlet water creates a longer hold.
Selected options
Sanitize, high-temperature wash and heated drying add heating or holding phases. Compare the option-specific time when the manual publishes one.
What to trust
Use the exact model manual and the live display. A published table establishes the expected range, not a promise to finish at one precise minute.