Level versus movement
A snapshot tells you how big something is. It cannot tell you which direction it is going. This is the single most expensive blind spot in trend work, because a trend at peak visibility and a trend on the way up look identical in a mood board — and committing development to the first one means arriving with product exactly as the market turns.
- Adoption level
- How many people have taken it up. Answers "how big is this now?"
- Acceleration (velocity)
- How fast that level is changing. Answers "is this still coming, or is it going?"
- Time to peak
- How long until uptake stops growing. Answers "when do I need product on the floor?"
The four states
| State | What it looks like | What to do |
|---|---|---|
| Accelerating | Uptake compounding; spreading into adjacent categories and new audiences | Commit new development; this is where lead time pays |
| Steady | Consistent uptake, no compounding; established in the wardrobe | Carry over and refresh rather than develop from scratch |
| Decelerating | Still highly visible, but growth has stopped and reach is narrowing | Do not develop against it; harvest existing options |
| Reversing | Actively shedding audience; early adopters have already left | Exit; visibility here is a lagging signal, not an opportunity |
How acceleration is read in F-Predict
F-Predict reports movement explicitly rather than leaving it implied:
- A velocity score on a scale from −100 to +100, where positive means adoption is accelerating, negative means decelerating and zero means stable.
- A weeks-to-peak estimate where the evidence supports one, with zero meaning the peak is now and an absent value meaning it is genuinely unknown rather than guessed.
- A per-platform read, because a direction routinely accelerates on one platform while decelerating on another, and the average of the two describes nothing.
- A momentum and direction-of-travel reading when comparing a scope against a previous run, so change is measured rather than remembered.
Why it drives lead time
Acceleration is only actionable relative to your own development cycle. If a direction peaks in twenty weeks and your cycle is thirty, you cannot serve it with new development — but you can serve it with a carry-over option in a new colour. If it peaks in fifty weeks, new development is exactly the right call. The number matters only when compared against how fast you can actually move.
Frequently asked
What is the difference between trend acceleration and trend adoption?
Adoption is how far a trend has spread; acceleration is how fast that spread is changing. A trend can have high adoption and negative acceleration — widely worn, and on the way out.
Can a trend accelerate again after slowing?
Yes. Re-acceleration usually follows a new driver — a cultural moment, a price shift, a category crossover. It is why acceleration should be re-read rather than assumed to be monotonic.
Is a high velocity score always good?
No. Very fast acceleration in a narrow audience often signals a micro-trend that will peak before a normal development cycle completes. Speed and durability are not the same property.
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