Noun
subtask (plural subtasks)
An act that must be completed as an element of completing a larger and more complex task.
A subtask of speech recognition and typically grouped with it. ; Topic segmentation and recognition: Given a chunk of text, separate it into segments each of which is devoted to a topic, and identify the topic of the segment. Source: Internet
From IOI 2010, tasks are divided into subtasks with graduated difficulty, and points are awarded only when all tests for a particular subtask yield correct results, within specific time and memory limits. Source: Internet