What Are Engineered Safety Solutions?
How can engineers identify a dangerous system condition before it becomes an accident? How can organizations reduce risks while a product is still being designed?
These are some of the questions that engineered safety solutions are designed to address.
Engineered safety is not simply about fixing a problem after something goes wrong. It involves identifying hazards, evaluating risks, developing mitigation strategies, and verifying that safety requirements are satisfied throughout a system's lifecycle. Dansob describes System Safety Engineering as a discipline focused on identifying, analyzing, and mitigating hazards in complex systems to support safe operation.
This approach can be particularly important for industries such as aerospace, automotive, defense, medical devices, utilities, nuclear energy, petroleum, semiconductors, rolling stock, and autonomous transportation, where system failures can have significant consequences.
But what does this process actually involve?
Why Is System Safety Engineering Important?
What happens when a failure is discovered only after a product reaches the field?
Depending on the system, the consequences can include downtime, expensive redesigns, regulatory complications, maintenance costs, or safety incidents.
This is why safety analysis is ideally integrated early into engineering and product development.
Dansob's published safety framework emphasizes identifying hazards and risks throughout the lifecycle rather than treating safety as a final-stage activity. Its approach includes hazard identification, risk assessment, risk mitigation, safety verification, and lifecycle safety management.
A proactive approach can help engineering teams ask important questions such as:
- What could go wrong?
- Why could the failure occur?
- What would happen if it occurred?
- How severe would the consequences be?
- How likely is the event?
- Can the hazard be eliminated through design?
- If it cannot be eliminated, how can the risk be controlled?
- How can the safety requirement be verified?
These questions form the foundation of structured system safety work.
What Is Hazard Identification?
How do engineers know what risks they need to control?
The first step is often identifying potential hazards.
A hazard is a condition or situation that can contribute to an undesirable event. Engineers examine system functions, components, operating environments, interfaces, human interactions, and possible failure conditions to identify potential hazards.
For example, a complex transportation system could involve electrical, mechanical, software, environmental, and human factors. Looking at only one component may not reveal how multiple failures or conditions could interact.
This is why system-level analysis is important.
Dansob identifies hazard identification as one of the core components of its system safety process and evaluates the likelihood and impact of identified hazards to help prioritize risks.
How Does Risk Assessment Work?
Once a hazard is identified, what should engineers do next?
They need to understand the associated risk.
Risk assessment generally involves examining factors such as the likelihood of an undesirable event and the potential consequences if that event occurs.
The objective isn't simply to create a list of possible failures. Engineers need to determine which risks require attention and what controls should be implemented.
A structured risk assessment can help answer:
Which hazards are most important?
Which risks require immediate mitigation?
Which risks can be reduced through design changes?
Which safety requirements need verification?
Dansob's system safety services include risk assessment across system design, operation, and environmental conditions to identify potential points of failure.
What Is FMEA and Why Is It Used?
Have you ever wondered how engineers analyze the ways individual components can fail?
Failure Modes and Effects Analysis (FMEA) is one commonly used technique.
FMEA examines potential failure modes and considers their effects on the larger system. This helps engineering teams identify and prioritize problems that may require corrective action.
For example, if a component fails, engineers may ask:
- What caused the failure?
- What function is affected?
- What happens to the subsystem?
- Can another component compensate?
- What is the potential consequence?
- Is additional monitoring or protection required?
FMEA is particularly useful because it encourages teams to examine failures systematically rather than relying only on assumptions.
Dansob lists FMEA among the established methodologies used in its system safety work.
What Is Fault Tree Analysis?
What if engineers want to understand how several events could combine to produce a major failure?
This is where Fault Tree Analysis (FTA) can be useful.
FTA is a top-down analytical technique. Engineers begin with an undesirable top-level event and work backward to identify combinations of failures or conditions that could contribute to it.
For example:
Top Event → System Failure
↓
Subsystem Failure + Control Failure
↓
Component Failure + Environmental Condition
This logical structure helps engineers understand relationships between failures.
Dansob uses fault tree analysis as part of its system safety methodology and identifies CAFTA as a tool for building and analyzing fault tree models for complex systems.
What Is Functional Hazard Assessment?
Could a system's function itself create a safety concern?
Functional Hazard Assessment (FHA) examines system functions and considers what could happen if those functions fail, malfunction, or operate incorrectly.
This can be particularly relevant in highly complex systems where multiple functions interact.
Dansob lists Functional Hazard Assessment among the system safety methodologies used to evaluate system risks.
The important question is not simply:
"Can the system perform its function?"
A safety-focused question is:
"What happens if that function does not perform as intended?"
That difference can significantly change how an engineering team evaluates a system.
How Does Safety Verification Work?
How can an organization prove that its safety requirements have actually been satisfied?
This is where safety verification becomes important.
A safety requirement should not simply exist in a document. Engineering teams need appropriate evidence that the requirement has been addressed.
Depending on the system, verification can involve:
- Testing
- Analysis
- Simulation
- Inspection
- Validation
- Documentation reviews
- Safety assessments
Dansob identifies safety verification as a core component of its system safety approach and describes the use of testing, validation, and simulations to ensure safety requirements are met.
Why Does Lifecycle Safety Matter?
Is safety analysis finished once a product is launched?
Not necessarily.
Systems change throughout their lifecycle. Components can be replaced, software can be updated, operating conditions can change, and maintenance activities can introduce new considerations.
That is why lifecycle safety management matters.
Dansob describes its approach as covering the system lifecycle from initial design through decommissioning.
A lifecycle approach can involve:
- Concept development
- Requirements definition
- Preliminary design
- Detailed design
- Testing
- Production
- Deployment
- Operation
- Maintenance
- Modification
- Decommissioning
This broader perspective helps prevent safety from becoming disconnected from actual system development.
Which Industries Need Engineered Safety Solutions?
Where are these services most relevant?
The answer is: industries where failures can have significant safety, operational, financial, or regulatory consequences.
Dansob identifies experience across several sectors, including:
- Aerospace
- Space
- Automotive
- Defense
- Medical
- Rolling stock
- Utilities
- Petroleum
- Semiconductor
- Air mobility
For example, aerospace systems can involve complex interactions between mechanical, electrical, software, environmental, and human factors. Medical systems may require careful consideration of failure consequences and verification. Automotive and autonomous transportation systems can involve interactions between sensors, software, controls, and physical systems.
Each industry has different requirements, which means safety analysis should be tailored to the system rather than treated as a one-size-fits-all process.
What Tools Are Used for Safety Analysis?
Can safety engineering be performed without specialized analytical tools?
Simple projects may rely heavily on structured documentation and engineering analysis, while complex projects can benefit from specialized software.
Dansob identifies several tools used by its system safety teams, including:
- CAFTA for fault tree analysis
- ReliaSoft for reliability analysis and management
- ISOGRAPH for fault tree, reliability, safety, and availability analysis
- PTC Windchill/RELEX for product lifecycle management
The software itself is not the safety solution. The value comes from applying appropriate engineering methodologies, accurate system information, and qualified analysis to the problem.
How Can Safety Analysis Reduce Engineering Problems?
Would it be cheaper to discover a major design problem during development or after deployment?
In many engineering projects, finding issues early provides more opportunities to modify the design before production or field deployment.
Dansob's recent material on system safety frameworks states that early hazard analysis can help detect risks before they become costly problems and can support reduced redesign and rework.
A proactive approach can therefore support objectives such as:
- Identifying risks earlier
- Supporting design decisions
- Reducing unexpected failures
- Improving system reliability
- Supporting certification activities
- Reducing avoidable redesign
- Creating better safety documentation
However, the actual benefit depends on the project, system complexity, engineering process, and quality of the available data.
What Should Companies Look for in a Safety Engineering Partner?
If you're considering safety engineering support, what questions should you ask before selecting a provider?
Consider asking:
Does the team understand your industry?
Different industries have different system architectures, safety requirements, and regulatory environments.
Can they perform multiple types of analysis?
A complex project may require more than one technique, such as FMEA, FTA, FHA, SSA, or probabilistic risk assessment.
Can they support the entire lifecycle?
Safety requirements may continue beyond the design phase.
Do they use appropriate analytical tools?
Specialized tools can support complex modeling and documentation.
Can they integrate with your engineering team?
Safety analysis works best when it connects with system design, requirements, testing, and validation.
Dansob states that its safety team works across multiple industries and uses established safety methodologies and industry specifications and regulations.
Frequently Asked Questions About Engineered Safety Solutions
What are engineered safety solutions?
They are structured engineering approaches used to identify hazards, evaluate risks, develop mitigation measures, and verify safety throughout a system's lifecycle.
What is system safety engineering?
System Safety Engineering is a discipline focused on identifying, analyzing, and mitigating hazards within a system so it can operate safely throughout its lifecycle.
What are the most common safety analysis methods?
Common methods include FMEA, Fault Tree Analysis, Functional Hazard Assessment, System Safety Assessment, Probabilistic Risk Assessment, Subsystem Functional Hazard Assessment, Zonal Safety Analysis, and Common Mode Analysis.
When should safety analysis begin?
Safety analysis can begin during the early concept and design stages rather than waiting until a system is nearly complete. Early analysis can provide opportunities to address hazards before later-stage changes become more difficult.
What is the difference between FMEA and FTA?
FMEA generally examines potential failure modes and their effects, while FTA works backward from an undesirable top-level event to identify combinations of contributing failures.
Can safety engineering improve reliability?
Safety and reliability are closely related but are not identical disciplines. A structured safety process can identify failure conditions and risks that may also affect system reliability and operational performance.
Which industries use system safety engineering?
System safety engineering is used across high-risk and complex sectors including aerospace, defense, automotive, medical devices, utilities, petroleum, semiconductors, rolling stock, and autonomous transportation.
Final Thoughts
How safe is a complex system before it reaches the real world?
That question cannot be answered through a single test or document. Effective safety engineering requires a structured process that considers hazards, risks, failure conditions, mitigation strategies, verification, and lifecycle changes.
Engineered safety solutions can provide that structured foundation by bringing safety considerations into system design and development. Methods such as FMEA, FTA, FHA, risk assessment, and safety verification allow engineering teams to investigate what could go wrong and determine how risks can be controlled.
For organizations developing complex or high-risk products, Dansob provides System Safety Engineering services covering hazard identification, risk assessment, mitigation, verification, and lifecycle safety management.
Sign in to leave a comment.