The creation of a scenario, that means an appropriate combinations of commands, controls and adjustments of the various installations, is one of the most typical applications of a domotic system, and is extremely difficult, if not impossible, to realize with the conventional installation.
The simplest scenarios are those that are recalled at the touch of a single pushbutton when you exit and come back home. In the morning for example, you turn off all the lights, lower the blinds, activate the security alarm system, switch the heating to saving mode and close motorized valves that control the flow of gas and water.
Some scenarios are planned to offer the highest comfort in certain situations, such as the night watching of a TV movie, the presence of friends at dinner or the morning waking. Other ones are thought to provide greater safety; if you hear at night unexpected noises in your garden, switching a single pushbutton you turn on the garden lights, start a video shooting and lower the blinds forget in raised position the night before. There is virtually no limit to the possible applications you can realize thanks to the domotic scenarios.