Patterns define how values change over time during an EPS. You can access them from the Operational data group in the toolbar.
Each pattern is a series of multipliers applied at a fixed time interval set in the calculation time settings. At every time step, the multiplier is applied to a base value. All patterns use this same interval, and if the simulation runs longer than the pattern length, the pattern repeats from the beginning.
Demand patterns are applied to the base demand at junctions and customer points to represent how consumption changes through the day. The multiplier scales the base demand at each time step, allowing the model to reproduce diurnal usage without changing the underlying demand values.
Reservoir patterns multiply the base head at a reservoir so the supplied head can vary over time. This is typically used when the upstream system does not provide a constant hydraulic grade and the available head changes throughout the day.
Pump patterns define how a pump operates over time by acting as a speed multiplier. A value of 1 runs the pump at its normal speed, 0 turns it off, and values in between represent reduced speed. This provides a simple way to represent scheduled operation or variable-speed behaviour without writing controls or rules.