This reference guide chapter documents the available Telemetry Reduction Functions.

For more detailed information on the motivation for reduction functions and their use in Hackystat, see Section 5.3, “Concepts: Reports, Charts, Streams, Y-Axes, Reduction Functions, Filter Functions”.

For more detailed information on the design and implementation of reduction functions, see Chapter 23, Software Project Telemetry: Defining Reduction Functions and Filter Functions.