Short definition

A person or team that answers for the coherence and quality of a domain of the organization — product, design, engineering — without doing all the work of that domain or validating every decision that touches it.

Full definition

In the book's French original, the term is "Garant," ordinarily someone who vouches for a commitment: they answer for what another has promised. The word keeps that idea of answering here, shifted from the person to the domain. This glossary renders it as "Guarantor."

In this blog's articles and in the book Malorean Corp., the term designates the function the organization turns to when an important choice touches a domain, when a limit is crossed or when something goes wrong. Every important domain has one: a Product Guarantor for product coherence and major trade-offs, a Design Guarantor for the design system and experience coherence, a Dev Guarantor for architecture, security and technical quality. Everyone can contribute to several domains; each domain keeps someone who answers for it.

The Guarantor makes the framework understandable, watches over its coherence and steps in when a decision goes beyond it. They are neither the executor of the whole domain nor a mandatory validation point.

Usage in the field

The term comes into play when professions become porous — a salesperson who builds a tool, a Product Manager who changes an interface, a developer who settles a product behavior — and it is necessary to say who answers for what. It is also used to set the level of risk or novelty beyond which a domain takes back control.

Synonyms and variants

Domain lead, point person, domain custodian. The book offers one version per language, which is not translated word for word.

Not to be confused with

• Ownership — carrying the decision and its consequences on the same perimeter; the owner carries a subject, the Guarantor answers for a domain that cuts across several subjects.
• Validator — a person whose agreement is required before every action; the Guarantor sets the framework within which people act without asking, and only re-engages beyond it.
• Expert — a person who knows how to do the work; the Guarantor is not necessarily the one who does it.

Examples

A salesperson builds a small internal tool with an AI: they remain responsible for their need, while the Dev Guarantor decides what the company agrees to keep alive technically and may ask for a review if security or sensitive data is involved.

A PM assembles a screen from design system components: no validation is required; if they invent a new pattern, the Design Guarantor takes back control.

Ambiguities / debates

The word spontaneously evokes systematic validation, hence a new bureaucracy. This glossary retains the opposite meaning: a Guarantor exists to allow more autonomy, because everyone knows where the responsibilities lie and when to re-engage them. How to set a standard explicit enough that people conform to it without consulting it remains an open question.