---
id: ins_jtbd-personas-not-demographics
operator: Adrienne Barnes
operator_role: Founder of Best Buyer Persona; B2B SaaS customer research consultant
source_url: https://bestbuyerpersona.com/
source_type: research
source_title: "Adrienne Barnes — Buyer Persona Methodology (synthesized from operator's published work)"
source_date: 2026-03-03
captured_date: 2026-05-02
domain: [pmm, research-discovery]
lifecycle: [voc-research, positioning]
maturity: applied
artifact_class: framework
score: { originality: 4, specificity: 4, evidence: 3, transferability: 5, source: 3 }
tier: B
related: []
raw_ref: raw/expert-content/experts/adrienne-barnes.md
---

# Personas built on demographics inform nothing; rebuild around Jobs to Be Done

## Claim
85% of companies create buyer personas, but 77% never use them. The failure mode is not personas as a concept, it is the demographic scaffolding ("Mary Marketer, 28, has a cat") that produces documents nobody can act on. Personas built on Jobs to Be Done segmentation rarely require more than 3-5 personas (vs. 10+ demographic ones) and every line in them maps to a business decision.

## Mechanism
Demographics describe who the buyer is; JTBD describes what the buyer is hiring the product to do. Content, product, support, and sales decisions all branch on the latter, not the former. A persona document that lists hobbies cannot tell you what blog post to write; a persona organized by job ("eliminate the manual reconciliation step in month-end close") tells you exactly what content topic, what product feature, what sales script. Barnes's discipline: if a piece of persona information cannot be traced to a specific business action, it does not belong in the persona.

## Conditions
Holds when:
- The team has access to actual customers for qualitative interviews (warm-introduced, not cold).
- Marketing/product/sales actually intend to consume the persona, not check a box.

Fails when:
- The "persona" exercise is a brand-hygiene deliverable for an agency pitch, JTBD rigor is wasted there.
- Pure-consumer brand work where demographic and identity signals genuinely drive purchase.

## Evidence
> "85% of companies create buyer personas, but 77% never use them."

> "Using JTBD segmentation, Barnes has never seen a company require more than three to five personas, compared to the ten or more that demographic approaches typically produce."

· Adrienne Barnes, *Best Buyer Persona* methodology

## Signals
- Persona document opens with the job-to-be-done, not a stock photo + age.
- Each section in the persona names which downstream artifact it informs (content topic, sales script, support macro, product brief).
- Persona count per company stays in the 3-5 range across every segment.

## Counter-evidence
B2C brand and DTC marketers (Sarah Levinger, behavioral-design school) argue identity-and-emotion signals predict conversion better than functional jobs. JTBD also under-serves industries where the buyer is not the user, channel-led enterprise software needs a buying-committee map that JTBD alone does not provide.

## Cross-references
- (none in current corpus)