Glossary — Board Operating System & Governance Concepts
The following terms define the methodology, tools, and operating principles behind PARRY and the Board Operating System framework developed by Lyoen & Partners. This glossary is designed for CEOs, board members, and governance professionals evaluating structured approaches to decision quality.
Board Operating System (BOS)
The cadence, forums, preparation rituals, decision rights, and follow-through mechanisms by which the board and leadership team govern the organisation day to day. It is not the board meeting. It is everything Before, During, and After the meeting — the full operating cycle that determines whether governance creates value or silently destroys it. The term was coined by Lyoen & Partners to describe the invisible infrastructure beneath board performance.
Decision Rehearsal
Structured, board-grade challenge against a strategic decision before it reaches the boardroom. Decision rehearsal probes assumptions, surfaces second-order risks, forces tradeoffs into daylight, and tightens the board narrative. It is the core function of PARRY. The premise: every CEO walks into their most consequential meeting having rehearsed alone. Decision rehearsal exists because that gap shouldn't.
Board-Grade Challenge
A standard of scrutiny equivalent to what a well-functioning board would apply to a strategic proposal. Board-grade challenge is rigorous, structured, and dispassionate — it tests whether a decision survives informed dissent, not whether it sounds persuasive.
PARRY
An AI-enabled Board Operating System developed by Lyoen and Partners Limited (Hong Kong). PARRY operates as a private, on-demand sparring partner for CEOs — delivering structured challenge across three modes: Decision Rehearsal (live), Virtual Board Member (coming soon), and Predictive KPI (coming soon). Credit-based. No subscription lock-in. PARRY is not a board portal, not a GRC tool, and not advice.
The House of Execution
An organisational metaphor developed by Lyoen & Partners. The Roof represents the Board Operating System — where strategy turns into decisions. The Walls represent delivery — where decisions turn into execution. The Foundations represent platforms, data, and organisational infrastructure that enable scale. When the Roof leaks, everything below floods.
The 3×3 BOS Framework
The diagnostic and operating model at the heart of the BOS methodology. Three disciplines — Before, During, and After the board meeting — applied across three layers: Information (what feeds decisions), Decisions (how they are made and recorded), and Rhythm (the cadence that drives accountability). Nine cells, each with a specific operating practice.
BOS Roof Diagnostic
A 2-minute self-assessment scoring board operating maturity across preparation quality, decision effectiveness, and follow-through accountability. 10 questions, scored out of 30. Developed by Lyoen & Partners as a lead qualification and governance awareness tool. Available at getparry.com/diagnostic.
Governance Steward
The internal role — typically a COO or Chief of Staff — who owns and operates the BOS independently after the 180-day engagement ends. The engagement is designed to transfer methodology to this person, ensuring zero consultant dependency from Day 181.
Fractional Operator
A senior practitioner embedded in an organisation one day per week for a defined period (typically 6 months). Not a consultant who observes and reports. Not a full-time hire. A fractional operator executes, transfers methodology, and exits. Lyoen & Partners operates on this model for all governance engagements.
Contextualisation Tier
PARRY's pricing dimension. Three tiers reflect the depth of organisational context PARRY uses when delivering challenge: Tier 1 (light — general governance patterns), Tier 2 (moderate — industry and company-size context), Tier 3 (deep — organisation-specific data, persistent memory, custom decision frameworks).