---
type: "synthesis"
tags: ["boundary-spanning", "interfaces", "roles", "cross-day"]
sources: ["ecosystem"]
id: "cd-boundary-spanning"
sourceVaultSlug: "hbr-seg-ecosystem"
originDay: 11
articleStem: "hbr-seg-ecosystem"
sourceUrl: "(unified vault: 5 sources)"
sourceTitle: "HBR — Ecosystem Ⅳ · Partnerships (thin arc)"
---
## The interface is the job

Across the corpus a new kind of role keeps appearing: the person or body whose entire function is to *manage the seam* between two worlds that don't naturally cooperate.

- Corporate VC formalizes it as [[concept-living-organizational-interface]] and staffs it with [[concept-bridge-builders]] (quarterbacks, seconded managers, advisory-committee leaders). [[quote-boundary-role]]: "We see ourselves as the boundary between our corporate partners and the startup." The whole [[framework-cvc-boundary-management]] is a boundary-management operating model.
- Negotiation independently reinvents the same apparatus: [[entity-roger-fisher]]'s decades-old call to *integrate internal and external negotiation* becomes the [[concept-consultation-funnel]] and the [[concept-deal-value-board]] — a standing body whose job is to translate across silos. Its design principles ([[framework-effective-deal-review]]) mirror the CVC's frontstage/backstage split ([[concept-frontstage-work]], [[concept-backstage-work]]).
- Family business puts a family member at the interface between two family firms, extending trust across the seam ([[action-recruit-for-f2f-values]] deliberately empowers non-family managers to hold it).

**The pattern:** boundary work is not overhead to be minimized; it is where the value is created or destroyed. The corpus treats it as a permanent, staffed, rhythmic discipline — not a one-time governance fix. Compare [[cd-internal-failure-mode]].