Safety Case Human Factors Integration VIEW FROM THE COALFACE This presentation was delivered at the...

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