Post on 31-Dec-2015
description
Extracting Models from ISO 26262
for Reusable Safety Assurance
Yaping Luo, Mark van den Brand, Luc Engelen, John Favaro, Martijn Klabbers, and Giovanni Sartori
Email: y.luo2@tue.nl
19-04-2023
Background
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Certification
Standards
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Compliance argument
Experts
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Our plan
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Common Certification Framework
Generalized meta-model for certification
Meta-models of standards
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Background
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??
?
Subjective
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Background
• Why?• Transparent: demonstrate our way of
constructing the model.• Traceability: show the argumentation to the
users.• Reduce time consumption: assessor could
understand other standard with shorter time cost, save the time for creating the models.
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Overview of ISO 26262 and Its Models
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Overview of ISO 26262
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Look from 3 different views—relationships between standard and project
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Safety Standard
ProductProcess
Adh
ere
to
Adhere to
Has output
Stan
dard
levelP
roject level
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Modeling for safety reuse
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Structure of ISO26262
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Our approach for safety reuse
Model Extraction method Description method
Tool
Conceptual model
Snow ball approach Ontology Protege
Process model
Mapping between standard and SPEM
SPEM EPF
Structure model
Table of content UML UML tool
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Conceptual model
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Basic ball Big ball Snowman Frame
Snowball approach
Rolling
snowball
Update
snowman
Snowman
Create
snowman
frame
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Snowball approach -----Rule based
Get basic concepts and relationships
Update the concepts and relationships
Refine and optimize the
model
Rules on concepts and
re la t ions
Rules on re f inement and
opt imiza t ion
Objectives Requirements
1 2 3
Basic ball Create snowmanRolling snowball
Validate the model
Domain Exper ts
Update snowman
Domain Knowledge
4
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Process model
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SPEM Software & Systems Process Engineering Meta-Model
• A UML profile created by Object Management Group (OMG) for meta-process modeling.
• Validated by a number of case studies (Supporting tools):
Eclipse Process Framework OpenUP/Basic, Microsoft Solution Framework Agile Case Study etc.
• Used in industry: Delphi etc.
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Concepts in SPEM Concepts in ISO26262Process Safety lifecyclePhase Part
Activity ClausePurpose Objective
Task Title of requirementStep Subtitle of requirement
Description General/Content of requirement
Work Product Work ProductInput Input
Guideline NoteExample Example
Mapping between SPEM and ISO26262
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Activity diagram of process model
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Thank you !
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Future Work
• To extend our methodology so that we can extract models from a collection of interrelated safety standards.
• A comparative study of those safety standards through those models.
• To define a domain specific meta-model for the processes found in safety standards. (Process Meta-Model with Safety Standard Awareness)
• To find the semi-automatic way for our approaches, such as Nature Language Process (NLP) techniques, Ontology Learning.
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A Process Meta-model with Safety Standard
Awareness
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Meta-model of standards
Define a process meta-
model
with standard awarenes
s
Develop the supporting tools
Using the tools
to describe the process in
the standard
s
Find the mapping between the
process model of standard
s
Idea of process model for certification
SPEM EPF Process Model
Suggestion for reuse
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Overview
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• SPEM• Models in OPENCOSS• Previous work of Altreonic
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SPEM
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Structure of SPEM
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Process Structure Package
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SPEM Work Product and Activity Kind
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• Mature process meta-model, with Eclipse tool support
• Not with safety standards awareness, too general for safety-critical process and certification.
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Models in OPENCOSS
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Safety Standards Meta-model
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Evidence Meta-model
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Process Meta-model in OPENCOSS
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? ?
?
• With safety standard awareness,
• Not focus on process meta-model, but CCL meta-model.
• Need to be improved.
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Previous Work
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Process Meta-model in GoedelWorks
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• With safety standard awareness• Only Notations• Supporting tool needs to be
improved
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