Test and Verification Solutions
Managing a secure requirements
engineering flow
within a complex product family
environment
in order to attain ISO26262 compliance
Delivering Tailored Solutions for
Hardware Verification and Software Testing
Presentation to Verification Futures February 2016
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Requirements Engineering
“Systematic and disciplined approach to the specification and management of requirements”
• Elicitation
• Validation and Negotiation
• Documentation
4
• Management
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Elicitation
What • Requirement
“Statement of need, clearly and accurately stated”
• Types of requirements
“Functional requirement”
“Non-Functional Requirement”
Who • Stakeholders
• Identification
• Responsibilities
• Requirement Engineers
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Validation and Negotiation
Requirements Quality Gateway • Review or Tool, boilerplates or modelling • Constraints and conflicts identified, negotiated and incorporated
DIA – Development Interface Agreement • Determines which work products delivered by which partner
• HARA Hazard Analysis and Risk Assessment decides which level of Safety
Communication • ReqIF proposes use of “HIS Exchange Process for Requirements” • Loss
• Complete set of data at both IF’s Tier 1 OEM etc-
• Data Integrity • Data correct at both IF’s Tier 1 OEM etc-> corruption, metadata, hierarchy, ontologies
• Security • Malicious or accidental data loss, corruption or theft
• Safety • Proof of Safety Culture and adherence from supplier to customer
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Documenting the Requirements
Natural Language • Discipline, Training, ontologies
MBSE • Tools, Training, Common understanding (ontologies)
Semi-formal notation • Highly recommended but not defined in the standard*
Configuration management • Tools, Discipline, Process, Variability management
Change management • Tools, Discipline, Process, Variability management
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Requirements Tracing
Join the Dots …. Simple!
Figure : Typical Requirements Tree
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Management of product Family
Orthogonal data view
Figure : Typical Requirements Tree Figure : Typical Requirements Tree
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Requirements ->test plan -> test results
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Tooling ecoSystem
Copyright T&VS 2015. All rights reserved.
Change
management
Requirement
management
Requirement
Quality
management
Interoperability
Standards Configuration
management
Middleware
SW test tools HW test tools
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Tool Choice Considerations
Complete ALM/PLM tools most effective and suited • May not consider all the domains required • May require some manual intervention • Data translation/movement may not suit secure solutions
Correct tool for the job • Different tool solutions suit different domains or work environments • Support of other tooling being used (at least no conflict)
Legacy tooling • Expensive to move • Extensive tailoring • Also expensive to stick together existing solutions
Costing • Multiple tools are expensive • Many ALM solutions have hidden extra costs • May be high on resource overheads to maintain or use tooling
Overkill • Don’t buy tools that have extras that you don’t use or need • If its small use Excel and good discipline and process!
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Process
Requirements Database
Variant x
xml
Variant x
Target Spec
Change
management
Refine
Refine
Variant x
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Auditability – Proving its been implemented
Requirements, need to be mapped to test and test to results
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MetaData
Ensure all the information gathered is reproducible
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Variant management
Reusability and management
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Questions
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