When compared to a pictorial representation of a system, a schematic is:

A schematic representation is fundamentally more efficient for documentation and updates compared to a pictorial representation of a system. This is because schematics use symbols and standardized representations to convey the same information in a more straightforward and concise manner. Updating a schematic is generally easier, as it involves modifying specific symbols or connections without needing to redraw complex imagery.

In contrast, pictorial representations can become cluttered and challenging to modify, especially when changes are made to the system. The use of symbols in schematics allows for quick identification and revision of components and connections, making them a practical choice for maintaining current and accurate documentation.