Dr Craig Dent

Supported decision-making (SDM) is often treated as a legal or clinical innovation. But in reality, it is a problem of system design.

How decisions are made, who supports whom, and how risk is managed are all determined by the structures, processes, and culture of institutions, from courts and public trustees to service providers and boards. Understanding SDM as a system design challenge is essential if autonomy is to be preserved in practice.

Reforms like Victoria’s 2020 guardianship changes provide a legal framework for SDM. Yet law alone does not guarantee that people’s voices are heard. Systems, the everyday routines, procedures, and organisational cultures, determine whether support becomes meaningful or slips into substitution.

Consider a typical scenario: a person requires assistance managing finances. The law may allow SDM, but:

• Financial institutions may have rigid processes that favour a guardian or administrator.
• Staff may lack training or resources to provide genuine support.
• A risk-averse culture may prioritise control over autonomy.

Without addressing these systemic barriers, SDM remains aspirational rather than operational.

If we approach SDM as a system design problem, several principles emerge:

1. Person-centred processes – The person’s preferences and priorities should guide every interaction.
2. Distributed responsibility – Supporters, institutions, and regulators share responsibility for outcomes.
3. Transparency and accountability – Roles, decisions, and supports are clearly documented and reviewed.
4. Flexibility and adaptability – Systems must accommodate changing capacities, contexts, and needs.
5. Training and culture – Staff and supporters require guidance, resources, and cultural alignment to empower rather than control.

These principles are not optional. They are essential for SDM to function beyond legal theory.

Treating SDM purely as a legal reform ignores the realities of human behaviour and organisational inertia. Systems determine how autonomy is experienced in practice. Poorly designed systems:

• Limit the effectiveness of SDM agreements.
• Create unintended substitution despite legal protections.
• Undermine the very rights that reforms aim to protect.

By contrast, systems designed with autonomy and support in mind make SDM possible at scale, not as an exception, but as the default.

Boards, public authorities, and policy-makers play a pivotal role. They must:

• Align policies, processes, and funding with the principle of support over substitution.
• Accept calculated risk as part of empowering autonomy.
• Measure success not only in compliance, but in lived experience and choice.

Supported decision-making is not a program or a procedure. It is a systemic shift, demanding coordination across law, practice, culture, and governance.