Task analysis involves analyzing people's jobs to understand: 1) What tasks people perform 2) What objects/tools they use 3) What knowledge is required The document provides an example task analysis of cleaning a house using a vacuum cleaner. It breaks the task down into a hierarchy with 7 subtasks, and notes the objects/tools involved like vacuum cleaner, attachments, and dust bags. Approaches to task analysis include task decomposition, knowledge-based techniques, and entity-relationship analysis.