
Understanding the game being played and its mechanics to make the best moves.
Most strategies fail not because they are poorly executed, but because they misread the situation from the start. Before deciding what to do, you need to understand what is really at stake — the forces at play, the critical pressure points, the invisible mechanics that govern the game, the reasonable goals and the audacious ones. Without this reading, you are acting on false assumptions and short-sighted thinking.
Together we define a solid battle plan so that you know your real levers, your points of impact, and how to build a sequence that actually holds up in the field.
How we build your strategy
Gathering field data & Mapping the battlefield
Before building a strategy, you need an accurate and complete picture of reality. We consolidate all available data — user research, quantitative and qualitative surveys, existing studies, internal audits, field analyses, direct observations — to produce a synthetic and shared reading of the situation. The goal is not to accumulate information, but to distinguish what truly matters from what is simply noise. This is the prerequisite for any strategic decision that actually holds.
Examining constraints & Defining the battle
Every strategy is built within a field of real constraints that must be identified before acting. We map the critical pressure points of your situation: economic model, acquisition constraints, internal and external tensions, power dynamics between actors. This step allows us to define precisely what is really at stake — on which terrain, with which resources, against which resistance, and for which objectives. Without this rigorous definition, strategy remains an intention with no grip on reality.
Modeling the strategic challenge
Understanding a complex situation cannot be improvised. We mobilize the most rigorous tools from decision sciences — game theory, gain/loss analysis, decision theory, risk theory — to model the deep mechanics governing your situation. Who are the actors involved? How do they really make decisions? What are the unstable equilibria, the tipping points, the underexploited levers? This modeling transforms an opaque situation into readable terrain, and turns intuitions into verifiable hypotheses.
Simulating stakes & Nominal and degraded scenarios
Before making a move, we test it. We build multiple scenarios — nominal ones, meaning what should happen if everything unfolds as planned, and degraded ones, meaning what happens when resistance accumulates, when actors don't play their expected role, when the environment shifts. Each simulated scenario reveals unanticipated opportunities, invisible risks, and necessary adjustments. Simulation is not a theoretical exercise: it is what transforms an ambitious plan into a robust strategy, capable of holding up in the field even when conditions change.
Understanding the battle, making the best moves
1Understanding the game being played
We meet to grasp your situation in its full complexity — your objectives, your constraints, the forces at play and what is really at stake. We consolidate all available field data to build an accurate and shared picture of reality.
2Understanding its mechanics
Our experts model the deep dynamics governing your situation — actors, tensions, tipping points, underexploited levers — to transform an opaque situation into readable terrain and turn intuitions into verifiable hypotheses.
3Making the best moves
We deliver a robust strategic action plan — the moves to make, in what order, with which resources — tested against nominal and degraded scenarios so that it actually holds up in the field.
Our innovation services
Behavioral sciences & Psychology
Behavioral economics
Decision psychology
Economic modeling
Acquisition constraints
Modeling & Analysis
Strategic modeling
Systems analysis
Actor mapping
Power dynamics
Center of gravity analysis & Tipping points
Decision sciences
Game theory
Decision theory
Risk theory
Uncertainty management
Simulation & Projection
Game simulation
Design fiction
Sprint vision
Product vision
Nominal & Degraded scenarios
Jo&Joe
The latest Accor hotel brand for Generation Z
Our differentiators

A real diagnosis from the outset
No graphic or advertising premise
Most of the time, when agency projects don't work, it's not because the execution is bad - agencies are professionals at execution. When your projects don't work, it's often because the initial diagnosis was poorly made (or not made at all). Stop making graphic, economic or advertising diagnoses - all problems are human. Take a step back: we'll help you to distinguish between the true and false in problems, so that you don't waste your time solving pipe dreams.

Get away from empty methods
Think outside the box
The second (very) big problem in creation and innovation is that bad methods die hard. Brainstorming, personas, user journeys, all these methods that you think are reliable are in fact your worst enemy. We explain to you scientifically why these methods don't work, or why they're just methods of execution and graphic representation that can't replace strategy.

Don't follow your users
Get ahead of them, surprise them
Do you really believe that by simply giving users everything they want you will strengthen your brand relationship? Do you think it will make them less disloyal? That they'll like you more? What if, in creation as in love, you started to become playful, surprising and amusing instead of simply following the rules? Get out of those dead advertising posters where nothing sticks out and start creating playgrounds.

Work with trainers
And not just consultants
A consultant doesn't have time to think. They just do it. We are teachers. We take the time to think, to explain, to train, to pass on to our students and to your teams. Because if you don't understand the concepts, if you apply recipes, if you don't integrate the principles of creativity, nothing will happen. Nothing will change.
Do you need help?
Do you have any questions? Do you need any help?
Please contact us.
User search
Scientific Research
Impact assessment
Digital Strategy
Innovation Strategy
Service Design
Game Design
Design Sprint
UX & Ergonomics
Psychology
Sociology
User research / UX research
Our latest interviews
Our latest conferences
Consumer Tests
Product Testing
Customer Reviews
Copyright © 2009 - 2026 Effet Majeur (formerly Fast & Fresh) - User research, Behavioral economy & Innovation Strategy Agency
Paris - Offices - 61 rue de Lyon, 75012 Paris





