# Is multi-touch attribution worth building for a Series B company?

Usually not as a weighted model. Get First, MQL and Latest touch clean and capture the rest as campaign membership — that answers most budget questions. Weighted multi-touch adds a modelling argument on top of data that is rarely clean enough to justify it.

The prerequisite for any multi-touch model is complete, consistently tagged touch data. Companies that jump to weighted models before fixing UTM discipline get a precise-looking number built on a source field that is 30% blank. Fix the entry points first; the model is the easy part.

## Sources

- **Method** — [Attribution playbook — The model decision](https://www.leanscale.team/knowledge/playbooks/attribution-playbook/)
- **Opinion** — [Why Is Multi-Touch Attribution So Hard?](https://www.leanscale.team/knowledge/podcast/bernardo-alves-multi-touch-attribution/)

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Cluster: Attribution · https://www.leanscale.team/knowledge/answers/multi-touch-attribution-worth-it/