Hydraulic calculations are used to verify the design of a fire fighting system, ensuring that the system performance will meet the criteria of the relevant design standards. The action of carrying out a Hydraulic Calculation will verify and validate the design and demonstrate that the system shall provide both sufficient volume and pressure to achieve the fire suppression goals. Hydraulic calculations are typically carried out using specialist computer software programmes enabling quite large and complex installations to be verified, and generating reports indicating where there are weaknesses within the design.