CONCEPT
Situated Action
Suchman's foundational thesis that competent action arises from improvised, moment-by-moment responsiveness to specific circumstances — not from executing pre-formed plans.
Situated action is Lucy Suchman's 1987 reframing of intelligent behavior as the responsive navigation of specific circumstances rather than the execution of plans. Drawing on ethnomethodology and her fieldwork at Xerox PARC, Suchman argued that plans function as resources for action, not determinants of it — more like travel itineraries than blueprints. Competence lives in the practitioner's capacity to read the situation and respond to what is actually there, improvising when the plan and the territory diverge. The concept became foundational for human-computer interaction, cognitive science, and the critique of classical AI, and it returns with fresh urgency in the age of large language models, which generate plans addressed to described situations rather than encountered ones.
In The You On AI Field Guide
The concept emerged from Suchman's observation that the photocopier help system at PARC assumed users had plans the system could recognize and support. Actual users did not have plans in this sense. They had vague intentions, partial understandings, and interpretive frameworks shaped by prior experience. They improvised constantly,