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van Veen, Barbara L. (author), Ortt, J.R. (author)The research into the perception of early signals, the so-called weak signals, started in the field of strategic planning in the 1970s. Soon, research dispersed into new, specialized fields, such as foresight, sense-making, and entrepreneurial alertness. Each field used different terms for weak signals and framed the research in its own...journal article 2021