Integrated Safety
Integrated Safety is a whole-system approach to safety that considers people, technical systems, organisations, environments and their interactions together, and assesses and manages the safety implications of their relationships across system boundaries, hierarchy and the life cycle, addressing safety in both individual parts and integrated arrangements.
A complex system is never only technology. Its safety depends not only on whether individual components perform safely, but also on how people, technologies, organisations and environments interact as a whole.
Integrated Safety makes these relationships visible enough to examine, assess, manage and communicate.
Why Integrated Safety?
Safety can become fragmented when different disciplines, organisations or technical domains examine only their own part of a system.
A component may be designed correctly. Procedures may exist. Staff may be competent. Regulations may be followed. Yet important hazards can remain at interfaces, handovers, dependencies, responsibility boundaries or combinations of conditions.
Integrated Safety therefore asks two connected questions:
- Are the individual parts sufficiently safe?
- Is the arrangement created when those parts interact and operate together sufficiently safe?
A collection of safe parts does not automatically create a safe whole.
Four introductory lenses
Integrated Safety can be introduced through four practical lenses.
Human
People, roles, behaviour, competence, culture and wellbeing.
Safety depends on what people do, what they understand, what they are expected to do and the conditions under which they act.
System and technology
Products, infrastructure, equipment, software, data, energy and interfaces.
Technical safety concerns not only individual components but also architecture, connections, dependencies and behaviour when systems are combined.
Context
Organisational, regulatory, societal, built, operational and natural conditions.
A system operates within an environment. Governance, regulation, organisational structures, supply chains, physical surroundings and changing external conditions can all influence safety.
Interactions
Interfaces, handovers, dependencies, feedback and combined effects.
Interactions are particularly important because safety properties can change when individually acceptable elements are connected.
These four lenses are an accessible way to introduce the problem. They do not replace the more detailed safety aspects and analytical viewpoints used in NTA 8287, Safety Cube Theory or the Safety Cube Method.
Across boundaries, hierarchy and the life cycle
Integrated Safety does not examine relationships from only one viewpoint.
System boundaries
Safety questions may cross organisational, disciplinary, technical and physical boundaries.
A problem located in one part of a system may have causes or consequences elsewhere.
Hierarchy
Safety needs to be considered within components and subsystems, at the level of the system under consideration, and in its relationship with the wider environment.
Life cycle
Safety develops over time.
Questions arise when functions are defined, systems are designed and integrated, and when they are operated, maintained, changed and eventually retired.
Three useful life-cycle perspectives are:
Functional — What should the system achieve, for whom, under which conditions, and with what safety objectives?
Technical — How should the system be architected, designed, produced, integrated, tested and validated safely?
Operational — How should the system be used, maintained, monitored, controlled, supported and eventually retired safely?
Integrated Safety therefore encourages safety thinking early and throughout the life cycle rather than treating safety only as an operational or compliance activity.
Integrated Safety and integral safety
The terms Integrated Safety and integral safety are related, but they should not automatically be treated as synonyms.
NTA 8287:2021 defines integral safety in relation to having all aspects necessary for safety.
Safety.Science uses Integrated Safety as a complementary whole-system approach for considering relevant safety aspects together and for assessing and managing the safety implications of their relationships.
Integrated Safety can therefore support the pursuit of integral safety, but it does not replace or redefine the terminology of NTA 8287.
This distinction is important because different standards, methods and scientific traditions may use related terminology for different purposes.
A familiar example: a hospital
Consider a hospital.
People include patients, clinicians, cleaners, visitors, managers and emergency responders.
Technical systems include medical devices, buildings, IT systems, power supplies, data infrastructure and digital services.
The wider context includes governance, regulation, supply chains, public expectations, surrounding communities and environmental conditions.
Interactions include clinical handovers, alarms, infection-control transitions, cyber-physical dependencies, emergency access, maintenance coordination and responsibility boundaries.
Each individual element may appear adequately controlled.
Integrated Safety asks what happens when several dependencies are stressed at the same time — for example during a cyber incident, staff shortage, equipment failure, extreme weather event, supply disruption or sudden patient surge.
The purpose is not simply to create a larger checklist.
The purpose is to understand whether the whole arrangement can remain acceptably safe.
What Integrated Safety does not mean
Integrated Safety is not simply the addition of separate safety disciplines.
It does not assume that interaction or integration automatically creates safety.
It does not replace domain-specific standards, professional expertise or established safety methods.
It is not presented as a single complete theory of safety.
Instead, it provides a whole-system perspective for asking where safety implications arise when different people, systems, organisations, environments and responsibilities are connected.
Scientific context
Integrated Safety sits within a wider scientific landscape concerned with systems safety, socio-technical systems, organisational safety, risk, resilience, human and organisational factors and the behaviour of complex systems.
These traditions increasingly demonstrate why safety cannot always be understood adequately by analysing isolated components alone.
Integrated Safety places particular emphasis on bringing relevant perspectives together while keeping their differences visible. Integration is therefore not the elimination of disciplinary expertise. It is the ability to understand how specialised knowledge, responsibilities and system elements affect one another when they form part of a larger arrangement.
For Safety.Science, this creates an interdisciplinary research space connecting technical, human, organisational, digital, environmental and societal questions.
Questions for research and practice
Integrated Safety encourages questions such as:
- Which relationships and dependencies are important for safety?
- Where do safety responsibilities cross organisational or disciplinary boundaries?
- Can individually safe components create unsafe combined behaviour?
- How do technical, human and organisational changes affect one another?
- Which assumptions made during design remain valid during operation?
- How does safety change across the life cycle?
- What happens when several normally manageable pressures occur together?
- Are important interactions missing from existing risk assessments?
- Where should safety be addressed earlier in design or decision-making?
- Can the whole arrangement remain acceptably safe when conditions change?
These questions can be applied to areas such as healthcare, infrastructure, energy systems, mobility, digital systems, AI-enabled services, industrial systems, emergency management and complex public services.
Relationship to Safety by Design and the Safety Cube
Integrated Safety is related to, but should not be confused with, several established or pre-existing NEDION-associated sources.
Safety Cube Theory provides a safety-specific conceptual treatment of fundamental safety aspects and their interactions.
The Safety Cube Method, formalised in NTA 8287:2021, provides a method for integral safety, integrated design, systems integration and safety assessment across multiple viewpoints.
Safety by Design develops related approaches concerning safe integration, Safety by integration, Safety Cube Theory and the Safety Cube Method.
Integrated Safety uses knowledge from this wider source base while functioning as the accessible whole-system scientific concept explained on Safety.Science.
Knowledge Brief: What Is Integrated Safety?
For a concise, citable explanation of the concept, see NEDION Knowledge Brief KB-001 — What Is Integrated Safety?
The publication information below is retrieved from the authoritative NEDION Press record.
Integrated Safety is a whole-system approach to safety that considers people, technical systems, organisations, environments and their interactions together, and assesses and manages the safety implications of their relationships across system boundaries, hierarchy and the life cycle, addressing safety in both individual parts and integrated arrangements.
What Is Integrated Safety?
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Integrated Safety on Safety.Science
Integrated Safety is a central scientific theme of Safety.Science.
Safety.Science provides the wider scientific environment in which the concept can be examined, connected to research and evidence, applied across domains, challenged, refined and developed through scholarly and professional contributions.
The Knowledge Brief provides a stable citable explanation of the concept. Safety.Science provides the broader scientific knowledge environment around it.
Content on this wider knowledge platform is not automatically a peer-reviewed journal publication. Where a contribution has undergone peer review or another formal review process, that status is stated in its authoritative publication record.