Why a brief comes first
This is the last lesson of the Foundations module, and it pulls everything together. Before you research or test anything, you need to agree what success looks like and whether you can measure it. In WXM terms, it’s the measurement baseline that the Wonder phase starts from (Wavesy).
A measurement brief is one page. If it’s longer, it’s a tracking plan (that comes next).
The brief, section by section
1. Journey. One journey only. “New visitor from a product ad to completed purchase.”
2. Business goal. The outcome the business cares about. “More completed orders without lowering margin.”
3. Primary metric. One number that tells you if the journey got better. “Completed orders per visitor.”
4. Guardrails. Numbers that must not get worse. “Average order value, refund rate, payment errors.”
5. Funnel steps. Four to six steps, each with its event name. Use standard names where they exist, like view_item, add_to_cart, begin_checkout and purchase (Google Analytics Help).
| Step | Event | Last 28 days |
|---|---|---|
| Product viewed | view_item |
|
| Added to cart | add_to_cart |
|
| Checkout started | begin_checkout |
|
| Order completed | purchase |
6. Data you trust (and don’t). “Purchases match the backend within 5%. Checkout steps don’t fire on Safari: fix before using.” Be honest here; everything later depends on it.
7. Questions for research. What the numbers can’t tell you yet. “Why do mobile shoppers leave at shipping?”
Common mistakes
- Too many primary metrics. If everything is primary, nothing decides.
- Choosing a metric because it moves easily. Clicks are easy to move. Orders are what matter.
- Skipping the backend check. Analytics and reality drift apart. Check once, note the gap.
Recap
One journey, one goal, one primary metric, a few guardrails, a short funnel, an honest note about data quality, and the questions you’ll research next. That’s your measurement brief, and the end of the Foundations module.
Next: turn the questions in section 7 into a plan in the Research module, starting with research planning. For the full event list, use the tracking plan template.
Practical exercise
Fill in the measurement brief below for your most important journey. Keep it to one page. Then check one number in it against your backend (orders, sign-ups or leads) and note how close they are.