The importance of measurement is widely understood. Measurement is at the heart of the scientific method and an essential activity in science and engineering.
"In God we trust, all others bring data" - Dr. Edwards Deming
In the field of quality control and management, data is collected and analyzed to identify process problems, plan improvements and quantify the effect of process changes.
"You can't control what you can't measure" - Tom DeMarco
In software systems, measurement is a critical component of performance analysis and improvement.
The sFlow standard, built into most vendor's switches, provides the measurements needed for visibility and control of network resources. A measurement-based approach to network management applies the best practices of science and engineering to network operations, replacing guesswork with decisions based on clear, quantifiable data.