The transient solvers begin by finding a static solution, that is, the fields that would exist in the device assuming the conditions at the start time had been held unchanged for all earlier times. The transient solution develops in time from this starting condition.

There are three methods by which the time steps for a transient solution are determined:

• Adaptive
• Fixed Interval
• User Defined

The time stepping methods are set before you initiate the transient solution process. You can choose to save only the solution at the first or last time step, or the solutions at specific time intervals or the solutions at all time steps.