Measure what works
Know what drives results — not just what you spent
Measure each channel's ROAS with credible intervals. The wide ones show where to sharpen the read.
Illustrative · Confidence you can act on
Enterprise-grade marketing measurement, built around customer lifetime value.
For consumer brands whose growth runs on repeat purchase and subscription — we own the numbers behind your budget, optimize for lifetime value, and stand behind the call.
Request a call →Measurement is everywhere. Accountability isn't.
The incumbents
Rigorous. But slow, pricey, and they build you a model, then leave the decision to you.
The platforms
Fast. But a black-box dashboard, with no one accountable for the call.
548 Marjan
Rigorous, fast, and accountable. We own the whole loop and grade the call against lifetime value — not just ROAS.
Most firms stop at the model. We don't.
We build the decision system around it: measure what works, calibrate the read, optimize the spend against lifetime value, and grade the calls. Better decisions, not just better models.
Calibrate the read
Buy down risk — don't just live with it
Run experiments that collapse the uncertainty. A shaky read becomes one you can confidently bet on.
Illustrative · Experimentation reduces uncertainty
Optimize the mix
Spend where it pays over a lifetime — not where it always went
Move budget toward the channels that build the most lifetime value — not just the last click.
Illustrative · More lifetime value from the same budget
Grade the decisions
Measure the calls — not just the model
Backtest your strategy against what would've happened. That's a scorecard for every decision made.
Illustrative · Proof the call paid off
The Practice
548 Marjan is a boutique marketing-science practice for consumer brands where customer lifetime value drives the economics. MMM and experimentation are the methods. Decision quality is the outcome.
Founded by James Henson. 12+ years across marketing measurement, forecasting, and stochastic modeling, with ~$200M in annual ad spend under management, from Series A to the Fortune 50. MEng, MBA.
James on LinkedIn →How we work with you
From first look to full partner.
Marketing measurement scoped to where you are — built around the lifetime value of your customers.
Not sure your data's even ready?
Measurement Diagnostic A directional read and a short memo — in days, credited forward.
Start here →
Have an MMM you don't fully trust?
MMM Validation / Second Opinion Is your current measurement decision-grade? Keep what works.
Get a second opinion →
Need real measurement built?
Measurement Sprint A marketing-mix model built and calibrated on your data, with an optimized budget.
Build the model →
Need to go deeper than the mix?
Experiments & Customer Modeling Incrementality tests and LTV/churn models, for the questions MMM alone can't answer.
Go deeper →
Want it running all year?
Always-On Measurement Ongoing optimization and decision quality, refreshed on your cadence.
Run it with us →
The part no one else shows you
We grade the calls we inform.
Once we're running your measurement, every recommendation goes in a decision ledger — scored against what actually happened. Ask any other firm for theirs.
Marketing measurement is complicated. Working with us isn't.
Marketing measurement is complex: the models, the experiments, the math. Your experience of it shouldn't be.
We do the hard analysis, walk your team through the trade-offs, and help you decide where the next dollar goes, with a clear read on how sure to be and what to expect.
Get in touch