Understanding the PEEPO Investigation Model in Psychosocial Investigations
Psychosocial hazards are increasingly recognised as a significant workplace health and safety issue across Australia. Factors such as workplace bullying, harassment, occupational violence, excessive workloads, poor organisational change management, and inadequate support can have a substantial impact on workers’ psychological health and wellbeing.
When psychosocial incidents occur, organisations need a structured and objective approach to identify contributing factors, determine root causes, and implement effective control measures. The PEEPO Investigation Model provides a practical framework for achieving these outcomes.
This guide explains how organisations can apply the PEEPO Investigation Model in psychosocial investigations to improve workplace safety, strengthen organisational systems, and support positive mental health outcomes.
What Is the PEEPO Investigation Model?
The PEEPO Investigation Model is a structured incident investigation framework that examines five key areas that may contribute to an event or workplace issue:
- People
- Environment
- Equipment
- Procedures
- Organisation
Rather than focusing solely on individual actions, the model encourages investigators to explore the broader workplace systems and conditions that may have contributed to an incident. This makes it particularly effective when investigating psychosocial hazards, where multiple workplace factors often interact.
Why Use the PEEPO Model for Psychosocial Investigations?
Psychosocial hazards are rarely caused by a single event or individual. They often arise from a combination of organisational practices, workplace culture, management decisions, and interpersonal interactions.
Applying the PEEPO model helps organisations:
- Conduct consistent and thorough investigations
- Identify underlying causes rather than surface-level issues
- Improve procedural fairness and objectivity
- Focus on system improvements rather than blame
- Meet workplace health and safety obligations
- Support evidence-based decision-making
The model is particularly useful when investigating matters involving bullying, workplace conflict, harassment, fatigue, excessive job demands, stress-related complaints, and other psychosocial risks.
Understanding Each Element of the PEEPO Model
People
The People component examines the individuals involved and how their actions, behaviours, skills, and interactions may have influenced the situation.
Questions to consider include:
- Were workers adequately trained and supported?
- Were communication expectations clear?
- Were there interpersonal issues or unresolved conflicts?
- Did managers provide appropriate supervision?
- Did workers understand their responsibilities?
In psychosocial investigations, people-related factors may include leadership behaviour, communication styles, workplace relationships, and individual responses to workplace pressures.
Environment
The Environment component focuses on the physical and psychological conditions in which work is performed.
Areas to assess include:
- Workplace culture
- Team dynamics
- Physical working conditions
- Remote and hybrid work arrangements
- Exposure to stressful or challenging situations
Work environments where communication is ineffective, support is lacking, or performance demands are consistently high may increase the likelihood of psychosocial risks.
Equipment
While equipment is often associated with physical safety incidents, it can also influence psychological wellbeing.
Investigators should consider:
- Technology systems
- Communication platforms
- Software usability
- Availability of work resources
- Reliability of equipment
Outdated systems, inadequate resources, or frequent technical issues can increase frustration, workload pressures, and workplace stress.
Procedures
Procedures refer to the policies, systems, and processes that guide workplace activities.
Investigators should examine:
- Workplace policies
- Reporting processes
- Complaint handling procedures
- Risk management systems
- Communication protocols
Unclear, outdated, or inconsistently applied procedures can create confusion and increase psychosocial risks.
Organisation
The Organisation component focuses on the wider organisational factors and management practices that may influence workplace outcomes.
Areas for review include:
- Leadership practices
- Workload allocation
- Resource availability
- Organisational change processes
- Performance expectations
- Workforce planning
Many psychosocial hazards stem from organisational decisions and systems rather than individual behaviour. Understanding these influences is essential for identifying effective solutions.
How to Apply the PEEPO Model in a Psychosocial Investigation
Step 1: Establish the Scope of the Investigation
Begin by clearly defining:
- The nature of the concern or complaint
- Individuals involved
- Relevant timeframes
- Investigation objectives
A clearly defined scope helps ensure the investigation remains focused, fair, and objective.
Step 2: Gather Relevant Information
Collect information from a range of sources, including:
- Interviews with involved parties
- Witness statements
- Emails and workplace communications
- Incident reports
- Workplace policies and procedures
- Relevant employment records
Maintaining confidentiality and procedural fairness throughout the investigation process is essential.
Step 3: Analyse the Evidence Using the PEEPO Framework
Review the available evidence against each PEEPO category.
For example, where a worker reports ongoing stress due to excessive workload:
- People: Limited support from supervisors
- Environment: High-pressure team culture
- Equipment: Inefficient software systems
- Procedures: No clear workload monitoring process
- Organisation: Unrealistic performance expectations
This structured approach helps investigators identify multiple contributing factors rather than focusing on a single issue.
Step 4: Identify Root Causes
Once contributing factors have been identified, determine the underlying causes that allowed the issue to occur.
Examples may include:
- Inadequate management capability
- Poor communication systems
- Insufficient psychosocial risk controls
- Resource constraints
- Ineffective organisational structures
Addressing root causes is critical to preventing recurrence.
Step 5: Develop and Implement Corrective Actions
Recommendations should address both immediate concerns and broader organisational issues.
Potential corrective actions may include:
- Leadership development programs
- Workload reviews
- Policy updates
- Improved reporting mechanisms
- Enhanced worker support systems
- Workplace culture initiatives
The objective is to reduce psychosocial risks and improve overall workplace wellbeing.
Step 6: Monitor and Review Effectiveness
After corrective actions have been implemented, organisations should assess whether they are achieving the intended outcomes.
This may involve:
- Worker consultation
- Follow-up reviews
- Staff surveys
- Psychosocial risk assessments
- Ongoing monitoring activities
Regular review supports continuous improvement and strengthens workplace health and safety performance.
Common Challenges When Conducting Psychosocial Investigations
Focusing Only on Individual Behaviour
Psychosocial issues often involve broader workplace systems and organisational influences. Investigations should avoid assigning blame without examining contributing factors.
Overlooking Organisational Factors
Leadership decisions, workplace culture, and organisational systems frequently play a significant role in psychosocial incidents.
Conducting Superficial Investigations
A rushed investigation may fail to identify underlying causes and result in ineffective corrective actions.
Failing to Follow Through on Recommendations
Investigations only deliver value when findings lead to meaningful action and measurable improvements.
Strengthening Investigation Capability Through Training
Applying the PEEPO Investigation Model effectively requires investigators to understand both incident investigation methodologies and psychosocial risk management principles.
Professional Psychosocial Hazards Training can help managers, supervisors, health and safety representatives, and investigators build the skills needed to identify psychosocial risks, conduct fair investigations, and implement effective control measures.
This capability is becoming increasingly important as Australian workplaces strengthen their approach to managing psychosocial hazards under work health and safety legislation.
Conclusion
The PEEPO Investigation Model provides a practical and systematic framework for investigating psychosocial incidents in Australian workplaces. By examining People, Environment, Equipment, Procedures, and Organisation factors, investigators can move beyond symptoms to identify root causes and implement meaningful improvements.
For organisations seeking to improve workplace wellbeing, meet their work health and safety obligations, and create psychologically healthy workplaces, the PEEPO model offers a valuable approach to conducting thorough, evidence-based psychosocial investigations.
At Trainwest, developing strong investigation and risk management capabilities helps organisations build safer, healthier, and more productive workplaces. Applying structured investigation frameworks such as PEEPO can play an important role in achieving these outcomes.
