Mk 211

---
name: mk-211
description: "Cross-Audience Testing of Winning Creative. Use when you need a trackable cross-audience validation plan; apply this method to the specified inputs and verify the deliverable"
---

# MK-211｜Cross-Audience Testing of Winning Creative

For a regular chat, upload `packs/mk-211.md`; it includes the shared rules, this method, and required references

## Purpose

This Skill delivers: **A trackable cross-audience validation plan**

Past success supports candidates and hypotheses only; shared content elements are not proven causes of success

## Required Inputs

Raw inputs: the same Post ID/creative version, original/new audience definitions, matched task/period, group spend/mature outcomes, overlap/exclusions, pages and spend limit

## Method Steps

1. Define the cross-audience hypothesis and fix creative version, outcome and destination; vary audience only. Separately list combinations that also change creative/page/offer, as they do not verify transfer of the same creative
2. Check mature business evidence and usable sources for the original winner. Success in inexpensive remarketing does not validate cold audiences. Record new-audience eligibility, overlap and task differences
3. Compare groups over matched periods/maturity windows with the same valid outcome and target. Unequal inputs can support cost/denominator comparisons, but automated unequal delivery is not an equal-input causal test. Retain testing for sparse or immature results
4. List transfer eligibility when the new audience supports task and cost with adequate evidence. Restrict use when only the original audience works; reduce/stop a new group that fails after destination/counting checks. Expand within the existing cap without assuming unchanged efficiency
5. Deliver group conditions, outcomes, differences, actions and next evidence that can revise the conclusion. Mature refunds, mixed groups or a new task update eligibility; preserve prior conclusions and distinguish planned tests from verified winners

## Calculation and Interpretation

Group cost is its spend divided by the same valid outcome. Do not average acquisition, remarketing and member groups together

Hypothetical check: original spend 400/four valid orders and new spend 400/one order, against a 150 target, supports restricting use to the original group. Correcting the new group to four mature valid orders gives cost 100 and permits a transfer candidate

Temporarily remove one valid order from the new group and recalculate. A flipped target/rank calls for continued testing. Supported candidates retain original audience, cost and new-group denominators for reevaluation after expansion

Decision rules authored by ThinkWithBlack on 2026-10-14; original course sources are retained below

## Required Output Fields

| Order | Field | How to fill it |
|---:|---|---|
| 1 | Post ID | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 2 | Source and period | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 3 | Performance across four dimensions | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 4 | Sample limitations | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 5 | Suitable use | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 6 | Elements to retain | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 7 | Test arrangement | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |
| 8 | Reasons for not using | Original evidence, intermediate method result, or explicitly unknown; do not fabricate |

## Method Sources

Original file: Meta廣告學程 103 如何有效放大成效

Source location: Hero

Source basis: Derived from course material

Original URL: https://docs.google.com/presentation/d/1LoV6FtBtLBi4MRoWgygvmEhgq7FwirK0Ik2_PJP6_8k/edit

English translation of source excerpt retained in the master table:

> These ads embody the Hero Post concept