Editor’s Note
This article explores the crucial role of trend forecasting bureaus in the fashion industry, detailing how they analyze cultural and social signals to predict future styles and compile their insights into influential “trend books” for designers and brands.

To anticipate upcoming fashions, the fashion industry relies on the expertise of very particular agencies: trend forecasting bureaus.
If you trace the origin of a trend, you often end up at a “trend forecasting bureau.” These agencies offer the fashion industry players “trend books.” These are large magazines, sold at a high price – up to 4,000 euros – and filled with photos, sketches, and explanatory texts. They present, 18 months in advance, what the trends will be for a given season.
However, trend bureaus employ neither fortune tellers, crystal balls, nor card readers. On the contrary, they claim a rational methodology. Pierre-François Le Louët, president of Nelly Rodi, one of the 5 historic trend bureaus, admits that in the beginning, in the 1960s, trend bureaus operated on intuition:
First step: collection. Nelly Rodi has a network of 21 correspondents scattered around the world. They are responsible for detecting what they call in their jargon “weak signals.” They identify what is new in all sectors of society: art, consumption, distribution, culture, etc. In the infinite mass of events and novelties, the difficulty is therefore to distinguish what is meaningful and what is not. According to Pierre François Le Louët:
But if these values may seem vague to the layperson, “weak signals” are, on the contrary, very concrete elements. It could be the opening of a surf shop in the heart of downtown Tokyo, the boom of tinted skincare creams in Seoul, or, in a completely different domain, the emergence of nationalist movements…
The correspondents collect this data and send it to the trend bureaus. Then, twice a year, the “trend committees” meet. Various professions are present: stylists of course, but also colorists or sociologists. After cross-referencing and analyzing the data, they create themes, four per season.
For the winter 2013-2014, Nelly Rodi thus developed the theme “Modesty.” Pierre-François Le Louët gives a few examples, among a hundred, of what inspired this theme:
Each theme is associated with an ambiance, colors, materials, shapes, etc. All of this is illustrated in the trend books and accompanied by socio-economic analyses. Each theme is declined in different areas: fashion clothing but also design, tableware, makeup, cosmetics, wearable technologies, bath linens…
But according to Sophie Levasseur, collection director at Camaïeu, trend books are not the only source of inspiration for stylists:
Another major source of inspiration for stylists: the January and March fashion shows. They influence what will be sold a few months, or even a few weeks later in stores. The fashion industry is now in a process of permanent updating. Everything moves very quickly, according to Pascaline Wilhelm, fashion director of the Premiere Vision trade show:
In case of urgency – particularly bad weather in summer, for example – Camaïeu can thus design, produce, and distribute new products in 6 weeks.