Constructive Scepticism as a Governance Control Function: Why boards must treat scepticism as a system requirement — not a personality trait

Dr Alwin Tan, MBBS, FRACS, EMBA (Melbourne Business School)

Senior Surgeon | Governance Leader | HealthTech Co-founder |
Harvard Medical School — AI in Healthcare |
Australian Institute of Company Directors — GAICD candidate |
University of Oxford — Sustainable Enterprise

Institute for Systems Integrity (ISI)

Abstract

Directors are often told to maintain a “healthy level of scepticism.” This is frequently interpreted as an individual mindset or behavioural trait. This paper argues that such framing is incomplete. Constructive scepticism is better understood as a governance control function — embedded within systems of information, delegation, and oversight. Drawing on regulatory guidance, governance literature, and ISI’s existing work on system integrity and failure, the paper shows that scepticism fails not because directors lack it, but because governance systems fail to support it. The result is a predictable pattern: compliance persists while challenge weakens, signals degrade, and oversight becomes ineffective.

Introduction

Governance frameworks consistently emphasise the importance of directors maintaining a “healthy level of scepticism.” In Australia, this expectation is reflected in the duty of care and diligence under s 180 of the Corporations Act 2001 (Cth), as well as in guidance from regulators and governance bodies such as ASIC and the Australian Institute of Company Directors (AICD).

However, scepticism is often treated as an individual behavioural expectation — something directors either possess or lack. This paper challenges that framing. Consistent with ISI’s prior work (Integrity Is a System Property; Why Oversight Fails Under Pressure), we argue that scepticism is not primarily a personality trait. It is a system-dependent capability.

When governance systems degrade, scepticism does not disappear — it becomes ineffective.

1. What is “constructive scepticism”?

Constructive scepticism is not cynicism, distrust, or adversarial behaviour. It is the disciplined practice of:

• testing assumptions
• interrogating evidence
• seeking alternative explanations
• identifying what could invalidate current conclusions

AICD guidance describes this as maintaining an “open but constructively challenging mind”, where directors listen to management but actively test the robustness of information and decisions (AICD 2022).

This form of scepticism is essential to effective oversight — particularly in complex, high-risk environments.

2. Why scepticism matters in governance

2.1 Risk oversight

ASIC’s analysis of board effectiveness highlights that strong boards actively challenge management thinking and interrogate non-financial risks (ASIC 2019). Failures often arise where assumptions go untested or signals are not escalated.

2.2 Decision quality

Constructive scepticism improves decision quality by:

• surfacing hidden assumptions
• exposing downside scenarios
• preventing premature convergence

This aligns with ISI’s work on Decision-Making Under System Stress, which shows that pressure conditions increase reliance on incomplete or biased information.

2.3 Accountability and defensibility

AICD guidance on board minutes emphasises the importance of recording substantive consideration and challenge, particularly where decisions involve risk (AICD 2024). Scepticism must be visible not only in discussion but in documented reasoning.

3. The problem: scepticism is treated as an individual trait

Despite its importance, scepticism is often framed as:

• a mindset
• a personality
• a behavioural expectation

This creates three problems:

1. Inconsistency — scepticism depends on individuals rather than systems
2. Fragility — it weakens under pressure or hierarchy
3. Invisibility — it is not embedded in governance processes

As a result, boards may believe they are exercising scepticism while systemic conditions prevent it from functioning effectively.

4. The ISI perspective: scepticism as a control function

Using The ISI Governance Control Loop, scepticism is not located in a single point. It operates across the system:

Constitution → Delegation → Decisions → Signals → Oversight → Review

Scepticism is expressed through:

• clear delegation limits (where challenge is required)
• decision processes (where assumptions are tested)
• signal integrity (what information reaches the board)
• oversight behaviours (how boards interpret and challenge)
• review mechanisms (whether systems are adjusted)

Failure occurs when any of these stages degrade.

5. Where scepticism breaks down

Consistent with ISI’s failure patterns, scepticism most often fails at three points:

5.1 Signal degradation

Information is filtered, delayed, or sanitised.
Boards cannot challenge what they cannot see.

5.2 Time pressure

Decisions are compressed.
Challenge is perceived as delay rather than protection.

5.3 Cultural constraint

Directors may hesitate to challenge:

• dominant executives
• consensus views
• perceived “successful” performance

This aligns with findings from ASIC and AICD on board culture and group dynamics (ASIC 2019; AICD 2022).

6. The risks of “too much” scepticism

While essential, scepticism can become counterproductive if misapplied:

• Cynicism — assuming management is always wrong
• Micromanagement — directors redoing executive work
• Decision paralysis — excessive challenge without resolution
• Innovation suppression — rejecting new ideas reflexively

NACD guidance highlights the need to balance oversight with management autonomy (NACD n.d.).

The objective is not maximum scepticism, but effective scepticism.

7. Operationalising constructive scepticism

Boards can embed scepticism into governance systems by:

• requiring explicit articulation of assumptions in board papers
• separating facts from assumptions in decision-making
• defining trigger points for escalation
• ensuring independent information channels
• recording challenge and reasoning in minutes
• periodically reviewing delegation structures

These practices move scepticism from personality to process.

Conclusion

Directors are expected to exercise scepticism. But expecting individuals to carry this responsibility alone is insufficient.

Constructive scepticism must be designed into governance systems.

When it is treated as a personality trait, it becomes inconsistent and fragile.
When it is embedded as a control function, it strengthens oversight, improves decision quality, and preserves system integrity.

Scepticism does not fail because directors stop asking questions.
It fails because governance systems stop supporting those questions.

Harvard-style references

Australian Institute of Company Directors (AICD) 2022, How to avoid dysfunctional board culture, AICD, Sydney.
Australian Institute of Company Directors (AICD) 2024, How board minutes can safeguard directors, AICD, Sydney.
Australian Securities and Investments Commission (ASIC) 2019, REP 631: Board mindsets and behaviours, ASIC, Canberra.
Commonwealth of Australia 2001, Corporations Act 2001 (Cth), Australian Government, Canberra.
National Association of Corporate Directors (NACD) n.d., Maintaining a High-Value Board-CEO Relationship, NACD, Arlington.