Transcript ASCE – Railway Hazard Log Technical summary Luke Emmet Exmouth House 3–11 Pine Street London EC1R 0JH T +44 20 7832 5850 F +44

ASCE – Railway Hazard Log
Technical summary
Luke Emmet
Exmouth House 3–11 Pine Street London EC1R 0JH
T +44 20 7832 5850 F +44 20 7832 5853 E [email protected] W www.adelard.com
Overview
• Background to Hazard Log Requirement
• Summary of requirements
• Design approach
• Main features
• Extending further
© ADELARD 2013
Background – Hazard logs
• Hazard Logs - an established risk management tool
• Key aspects
• Hazards, Accidents, Causes, Controls
• Risk aggregation
• Management to closure
• Different flavours and commercial tools available
• But:
– May not be tailored to your domain
– Is the conceptual model is right for you?
– You can accept any imposed process
• Alternative – design your own
– Needs implementation
© ADELARD 2013
TFL Hazard log concept
• TFL have developed their own hazard log based on Railway practice
• A specific conceptual model for Railway domain
• To reflect managed upgrade of live infrastructure
• A common set of elements in different states for different System Configurations (SCs)
• Core hazards to be consistently considered
• To allow for incremental approval over lifecycle phases and geographical areas
• A graphical approach to model the causal chain
• Somewhat similar to “Bow tie” analysis
© ADELARD 2013
Summary of requirements
• Data model as per specification
• Graphical modelling of Core hazards, Causes, Consequences, Protection Measures
and Actions
• Filtering and editing by SC
• Traffic lights and Calculate Status
• Check for anomalies
• Use MS Excel to manage other data
• System Configuration definition
• Citations of evidence, domain elements, actionees etc.
• Reporting to MS Word
• Automatic change log
© ADELARD 2013
Design approach
• A custom schema and plugin
• Both work together to implement the requirement
• Schema – Railways Hazard Log 0.5
• Defines visual appearance
• Traffic lights and decorators
• Implements customer terminology
• Plugin – System Config Hazard Log Plugin
• Adds extra menus into ASCE
• Provides popup windows
– Filter, Editor, Reporter, LogEntry
• Builds on standard ASCE behaviour
• Some extensions to ASCE itself
• Part of ASCE 4.2 release
© ADELARD 2013
Schema – visual design
• Draw nodes and links
in the normal way
• Hazard at the centre
• Consequences
flowing from
• Causes flowing into
• Protection measures
and actions linked
• Link direction is
significant
• Traffic lights show
status
© ADELARD 2013
Schema – multiple SCs
• Nodes
• Each node shows the details of the element in a
particular SC
• Links
• Each link shows the connectivity in a specific SC
• Can filter the network for different SCs
• When creating nodes and links they are added to
the active SC
• Active SC – displayed red
– for authoring/analysis and reporting
• Secondary SC – displayed grey
– for comparison
– can link in existing elements
© ADELARD 2013
Graphical filtering
• The view can be filtered
• Show Filter menu
• Shows the Filter tool window
– Can leave open if needed
• Filters by chosen SC
• Then by Hazard Status
• Then by Actionee
• All elements can be shown via inbuilt ASCE
function
• Show all nodes and links
© ADELARD 2013
Node custom editor – attributes tab
• To change properties of the node in its
displayed SC
• To add/remove linked objects
• A floating tool window – you can leave it
open
• As you click on other objects it will show
them
• Node is updated immediately as you
change its data
• Can also use in-built ASCE properties editor
© ADELARD 2013
Node custom editor – linked objects tab
• To add/remove linked objects
• Sources, Documents
• QRA model elements, System
Elements, System Interfaces
• To add/remove implementation
managers for actions
• Lists items defined in project
spreadsheet
© ADELARD 2013
Calculated status/Status
• A calculated field
• Based on status of linked actions
• Other algorithms possible
• Status
• User editable field
• Depicts an engineering judgement
• Other traffic lights possible
• SFARP
• Risk level
© ADELARD 2013
Check for anomalies
• ASCE is a fairly free-form editor, designed not to get in your way
• When ready you can check the structure and embedded links
– Similar approach implemented in the hazard log
• Check for anomalies menu function
• To identify structural problems to be rectified
• Rules implemented include:
• No more than 3 levels of causes feeding into a hazard
• Restrictions cannot be linked to implemented Protection Measures
• …
© ADELARD 2013
Export report
• Create a report to MS Word of the current hazard log in some SC
• Various report types defined
• Can be extended
© ADELARD 2013
Change Log
• A simple change log is implemented
• To support audit/review
• Records a log of changes
© ADELARD 2013
Non graphical data held in Excel
• Project files live with each ASCE file
• Defines SC details
• Specify linked objects, actionees and domain elements
• Benefits of using Excel
• Prevents visual clutter
• Provides a familiar editing experience for tabular data
© ADELARD 2013
Demo
Demo….
© ADELARD 2013