So sánh phương pháp

	Weak Signal Analysis	Environmental Scanning for Foresight
Lĩnh vực	Futures Foresight Studies	Futures Foresight Studies
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1975	2003
Người khởi xướng	H. Igor Ansoff	Joseph Voros (generic foresight process framework); Millennium Project / Futures Research Methodology
Loại	Early-warning pipeline for graduated response to faint strategic signals	Input-stage scanning pipeline for the generic foresight process
Công trình gốc	Ansoff, H. I. (1975). Managing strategic surprise by response to weak signals. California Management Review, 18(2), 21-33.	Voros, J. (2003). A generic foresight process framework. Foresight, 5(3), 10-21.
Tên gọi khác	Weak Signals, Ansoff Weak-Signal Analysis, Strategic Issue Early Warning, Graduated Response to Weak Signals	Foresight Environmental Scanning, Strategic Environmental Scanning, Foresight Input Scanning, Voros Input-Stage Scanning
Liên quan	4	4
Tóm tắt	Weak signal analysis is H. Igor Ansoff's approach to managing strategic surprise by responding to faint, ambiguous early indicators of discontinuity long before they harden into unmistakable trends. Ansoff's 1975 argument was that organizations relying on strong, well-confirmed signals are condemned to react too late, because by the time a discontinuity is obvious the room to maneuver has collapsed; the alternative is to detect change while it is still a whisper and to graduate the response as the signal strengthens. The method rests on a ladder of knowledge states — from a vague sense that something is stirring to precise quantitative understanding — matched to a ladder of responses, from heightened awareness through increased strategic flexibility to direct action. As codified in the Millennium Project's Futures Research Methodology, weak signal analysis turns scanning from passive observation into an early-warning system that trades the certainty of late information for the maneuvering room of early, tentative response.	Environmental scanning for foresight is the systematic surveillance of an organization's external environment to collect, filter, and interpret the signals of change that feed a structured foresight process. In Joseph Voros's 2003 generic foresight process framework, scanning is the input stage — the activity that gathers the raw material on which all subsequent analysis depends — and the quality of that input bounds the quality of everything that follows. The method is deliberately broad and continuous: it casts a wide net across many channels, sifts the resulting flood for what is relevant, and interprets the survivors into emerging trends and issues. As codified in the Millennium Project's Futures Research Methodology, environmental scanning is the foundational discipline of strategic foresight, valued because foresight that rests on a narrow or stale view of the environment is foresight built on sand, however sophisticated the downstream methods.