Before building a future world, you need to observe the present carefully. Not the present that media portray — the one that emerges by looking at margins, exceptions, small movements that today seem irrelevant but tomorrow might become central. These hints are called "weak signals".
A weak signal is not a forecast — it is an anomaly, an exception, an emerging behaviour that might indicate a direction of change. In 2005, few observed early social networks as weak signals of a communication transformation. In 2010, few noticed early machine learning experiments as weak signals of AI accessible to everyone. Today, what are we ignoring?
The STEEP framework helps organise scanning across five dimensions: Social (demographics, culture, movements), Technological (innovations, infrastructure), Economic (business models, inequalities), Environmental (climate, resources, biodiversity) and Political (governance, regulation, conflicts). You do not need to cover everything — you need to look systematically, not randomly.
The distinction between trends and weak signals is crucial. A trend is already visible and measurable: transport electrification, population ageing, growing digital surveillance. A weak signal is still fragile: a small electronics repair movement, a community experimenting with local currencies, a court recognising a river's rights. Trends tell us where we are; weak signals suggest where we might go.
The Institute for the Future (IFTF) and other think tanks use horizon scanning to feed participatory scenarios. The method is not predictive — it does not try to guess the future. It is exploratory: it maps the forces at play to build plausible, not probable, futures. Joseph Voros' futures cone visualises this distinction: from the present open possible (broad), plausible, probable (narrow) and preferable futures.
In a design fiction lab, scanning is the research phase that precedes creation. Signals are collected, drivers discussed, tensions identified — and only then does world-building begin. Skipping this phase produces generic "futuristic" artefacts, without roots in the present and therefore without critical power.