| name | evaluate-channel-mix |
| description | Evaluate channels on contribution and marginal ROI under a stated attribution model — not average ROI or lead count. Reach for this on a channel or budget question. |
Skill: Evaluate channel mix
Attribution choice changes the ranking, and average ROI hides saturation (§3 #2 #5).
Step 1 — State the attribution model
First/last/multi-touch named before any number (§3 #2).
Step 2 — Compute channel ROI
(Contribution − cost) ÷ cost via marketingops_calc.py channel-roi.
Step 3 — Read marginal ROI
The next dollar's return, not the blended average (§3 #5).
Step 4 — Reallocate
Move budget off saturated channels toward higher marginal ROI.
Output
A channel read with the attribution model named and marginal-ROI reallocation.