Post on 17-Jan-2016
Safety Case Human Factors Integration
VIEW FROM THE COALFACE
www.adwheatley.com
This presentation was delivered at the IEHF – HFI in the Nuclear Industry Event – 9th November 2015
© A.D. Wheatley
FOCUS• The View from the Top
• The Problem Space
• The Vision
• The Reality
• Hindsight
• The Challenges
• The Opportunities
• The Horizon
THE VIEW FROM THE TOP• A Huge Project
• Safety Case split into four phases
• Eleven buildings under one roof
• Hundreds of labourers
• Hundreds of engineers
• Tens of Assurance Personnel
• ?? Human Factors
• Where do we fit in?
THE PROBLEM SPACE• Human Factors Integration on a Massive Safety Case
• Integration across Safety Case Phases
• Integration with Engineering - Phases / Lifecycle
• Integration with Assurance
• Deterministic / Conservative / Best Estimate
• Quantitative / Probabilistic
• Qualitative
• ALARP
Human Factors
Integration
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
Safety Requirements drive the development of Manual or Engineered Systems / Safeguards
Manual tasks rely on an optimised working environment to be effective
Engineered / automated systems rely on Supervision, Inspection and Maintenance to ensure they perform on demand
Complex systems need to be operated or supervised
Automated systems need to be maintained
EHF seek to optimise the task & working environment
Opportunity and probability of Human Error is minimised
Any claims on Operators or Maintainers to maintain a Safe environment is underpinned by solid Ergonomic System design
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
Assurance assess the potential shortfalls in the Capability / Engineered
Systems to maintain safety
Relationships
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
EHF support engineering in optimising the Operability, Recoverability and Maintainability of the System within the Working Environment
Assurance assess the potential shortfalls in the capability of Engineered
systems to maintain safety.
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
EHF support engineering in optimising the Operability, Recoverability and Maintainability of the System within the Working Environment
Assurance assess the potential shortfalls in the capability of Engineered
systems to maintain safety
HRA draws on PSFs and EPCs that rely on
optimised EHF design
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
EHF support engineering in optimising the Operability, Recoverability and Maintainability of the System within the Working Environment
Assurance assess the potential shortfalls in the capability of Engineered
systems to maintain safety
HRA draws on PSFs and EPCs that rely on
optimised EHF design
Shortfalls in Engineered Safety Measures place claims on Operators and Maintainers
Probabilistic Safety Assessment requires Human Reliability Assessment
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
We are not Occupational Health & Safety.The TA / HEI can help you understand user
needs and identify where operators are most likely to make mistakes, therefore target where
to focus HF support to Engineering
Crossover Message to Engineering
ENGINEERINGASSURANCE
ErgonomicsHuman Reliability
We’re not just here to do HRA.By getting the basic Ergonomics right,
Operators are less likely to make mistakes
Crossover Message to Assurance
noisetemperature
humidity
HMIsimplicity
spacefeedbacktask salience
lighting
fatiguephysiological stress
visibility
time pressuretraining
shift patterns
teamwork
understandingworkloadstress
experience
risk perception
Environmental Design
Workplace / Task Design
Physiological Demands
Psychological Factors
Organisational Factors
Maintenance
Hazard IE SM1 SM2 SM3
THE REALITY• Huge Complexity
• No one person can know everything
• Layers of middle management and integration teams
• Subcontracting
• Transient Personnel
• Unavoidable Time and Cost constraints
• ALARP
HINDSIGHT• What we got right:
• EHFA
• Focus on TA & HEI
• The HFIP
• Integrity
• Need to improve:
• Optioneering
• Requirements
• Issue Tracking / Recommendations / Actions
• Design House Integration
CHALLENGES• Human Factors
• Understanding complexity that has evolved over many years
• Avoiding analysis fatigue
• The far side of human performance
• Hand-cranks
• Movement Speeds
• Push-pull forces
• Lift-lower forces
• Slips/trips/falls
• Violations
OPPORTUNITIES• Changing Attitudes and Behaviours
• Consistency of HF across the whole supply chain
• Early Design House Engagement
• Bringing together TA / HEI / MFD / MSD / PFS etc.
• Research into Human Extremes
• Violations
• Tracking issues / recommendations / actions
• Task & Error Analysis
• Requirements and VVRM
• Learning from Experience
• Are we?
THE HORIZON• Culture of True Integration
• Attitudes & Behaviours
• Provision of a support service
• Facilitators AND Gatekeepers
• Problem Identification AND Problem Resolution
• Assessment AND Substantiation