Requirements - Hardware Conference
Requirements - Hardware Conference
Requirements - Hardware Conference
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
The impact of<br />
requirement traceability<br />
in safety critical designs<br />
Rick Stroot<br />
Senior Application Engineer<br />
InnoFour<br />
June, 2013
<strong>Requirements</strong><br />
Are there written requirements<br />
for the System, Software, PCB,<br />
FPGA?<br />
— Are they clear?<br />
— Are they complete?<br />
Will the requirements change?<br />
— How frequently?<br />
— How to manage the changes?<br />
How are the requirements<br />
being tracked?<br />
— Manually?<br />
— Only occasionally?<br />
— Not at all?<br />
System SW<br />
<strong>Requirements</strong><br />
PCB FPGA<br />
2<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer Overview Flow<br />
Cabling<br />
PCB<br />
Requirement Management<br />
System<br />
<strong>Requirements</strong><br />
<strong>Hardware</strong><br />
FPGAs/ASICs<br />
MPUs/DSPs<br />
Impact Analysis<br />
Traceability<br />
Matrix<br />
Software<br />
Automated Reporting<br />
3<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
<strong>Requirements</strong><br />
Design<br />
Specification<br />
Identifier<br />
Attributes<br />
References<br />
Description<br />
DS_02<br />
Priority : HIGH<br />
Covers : PR_02<br />
The design shall be power efficient<br />
<strong>Requirements</strong> to detail intended<br />
functionality of the chip<br />
Analyze requirement sources in<br />
place<br />
— <strong>Requirements</strong> Extracted From<br />
– DOORS<br />
– Word<br />
– Excel<br />
– PDF<br />
– Many other tools & databases<br />
Each requirement consists of a unique<br />
identifier, defined attributes,<br />
upstream references &<br />
it’s textual description<br />
4<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
<strong>Requirements</strong> Tracing<br />
Throughout the Development Stages<br />
Covers<br />
Covers<br />
Product<br />
<strong>Requirements</strong><br />
LRU<br />
Specification<br />
40% 60%<br />
Design<br />
Implementation<br />
Are all the<br />
requirements<br />
implemented &<br />
tested?<br />
What shall I<br />
work on next?<br />
What does<br />
this part of<br />
the LRU do?<br />
5<br />
Project<br />
Manager or<br />
Certification<br />
Authority<br />
<strong>Hardware</strong><br />
Designer<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com<br />
System<br />
Architect
Report Generation<br />
PR_01<br />
PR_02<br />
PR_03<br />
Covers<br />
DS_01<br />
DS_02<br />
DS_03<br />
Traceability<br />
Matrix Report<br />
PR_04<br />
DS_04<br />
PR_05<br />
Product<br />
<strong>Requirements</strong><br />
Covers<br />
DS_05<br />
Design<br />
Specification<br />
Common report generation<br />
— Traceability matrix<br />
— Impact analysis<br />
Fully customizable<br />
— Content, style, output format<br />
Accurately reflects current state of<br />
the live project data<br />
Generate artifacts for safety compliance audits or design reviews<br />
6<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Traceability Matrix Report<br />
7<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Impact Analysis<br />
Understand the Effect of an Engineering Change Order (ECO)<br />
Impact<br />
Change<br />
Covers<br />
Impact<br />
Impact<br />
Impact<br />
Covers<br />
Impact<br />
Product<br />
<strong>Requirements</strong><br />
Design<br />
Specification<br />
Design<br />
Implementation<br />
20% 40% 60%<br />
Can I make a<br />
change to this<br />
requirement?<br />
This might<br />
push out the<br />
schedule!<br />
Which tests do<br />
we need to<br />
update?<br />
System<br />
Architect<br />
Project<br />
Manager<br />
Quality<br />
Assurance<br />
8<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Change Management<br />
Snapshot & Compare Project Status<br />
DS_02<br />
Alpha<br />
Priority : HIGH<br />
Covers : PR_02<br />
The design shall be power efficient<br />
DS_02<br />
Beta<br />
Priority : CRITICAL<br />
Covers : PR_02, PR_06<br />
The design shall be power efficient<br />
Ability to compare the<br />
requirement data at points<br />
throughout the project life cycle<br />
— <strong>Requirements</strong> definition<br />
— Traceability information<br />
Generate impact analysis<br />
reports<br />
— Based upon the changes that<br />
have occurred<br />
Compare between different<br />
snapshots<br />
— Or against the current analysis<br />
of the live data<br />
Automate communication<br />
between team members<br />
— When changes occur<br />
9<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Snapshot<br />
10<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Composite Projects<br />
Cabling<br />
PCB<br />
Bring multiple<br />
ReqTracer projects<br />
together<br />
System-wide<br />
requirement<br />
coverage<br />
System<br />
<strong>Requirements</strong><br />
<strong>Hardware</strong><br />
Software<br />
FPGAs/ASICs<br />
MPUs/DSPs<br />
Global project<br />
reports /<br />
traceability<br />
matrix<br />
Overall project<br />
visibility<br />
Sub-projects<br />
independently<br />
maintained<br />
11<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Composite Projects<br />
12<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
System Modeling Tracking<br />
13<br />
System<br />
<strong>Requirements</strong><br />
System<br />
Modeling<br />
Concept<br />
Verification Plan<br />
Simulation &<br />
Analysis Results<br />
Concept verification<br />
Provides a virtual lab<br />
for creating &<br />
analyzing analog,<br />
digital, & mixed-signal<br />
systems<br />
Allows design<br />
verification of<br />
hierarchical schematic<br />
& circuit elements<br />
Provides concept<br />
verification through<br />
block diagrams &<br />
transfer function<br />
blocks<br />
Reduce cost & delays<br />
of prototyping<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
PCB <strong>Requirements</strong> Tracking<br />
PCB<br />
<strong>Requirements</strong><br />
Constraints: CES<br />
Schematics<br />
BOM<br />
parts list<br />
Verification Plan<br />
System Modelling<br />
& Test Circuits<br />
Simulation &<br />
Analysis Results<br />
Constraints<br />
— Associate<br />
constraints on a net<br />
with a requirement<br />
Schematic<br />
— Associate a<br />
schematic block<br />
with a requirement<br />
Verification Results<br />
— Associate results<br />
from PCB<br />
verification tools<br />
such as<br />
signal integrity,<br />
manufacturability &<br />
thermal analysis<br />
with a requirement<br />
14<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer Interface to Constraint Editing<br />
System (CES) & DxDesigner (DxD)<br />
15<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Software <strong>Requirements</strong> Tracking<br />
Integration to<br />
Mentor’s CodeBench<br />
in development<br />
Software<br />
<strong>Requirements</strong><br />
Architecture<br />
(ex. UML)<br />
Implementation<br />
Unit Tests<br />
IDE for out-of-box<br />
bare-metal & Linux<br />
development<br />
Comprehensive<br />
target support<br />
— From<br />
microcontrollers<br />
to advanced<br />
microprocessors<br />
QA Plan<br />
Test Results<br />
Broad evaluation<br />
board support<br />
— Enables “install-todebug”<br />
in minutes<br />
16<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer<br />
17<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
FPGA/ASIC <strong>Requirements</strong> Tracking<br />
VHDL<br />
FPGA/<br />
ASIC<br />
<strong>Requirements</strong><br />
Verilog<br />
Design<br />
Sources<br />
VHDL<br />
Verilog<br />
Test Bench<br />
Sources<br />
Verification Results<br />
Just because<br />
you are<br />
designing to an<br />
FPGA, doesn’t<br />
mean you get a<br />
second chance<br />
when your<br />
product fails in<br />
the field!<br />
Verification Plan<br />
18<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Tracing FPGA Data<br />
19<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
HDL Designer:<br />
Referencing <strong>Requirements</strong><br />
20<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Reusing <strong>Requirements</strong> Tags<br />
Reusing previously designed IP/design blocks<br />
— Proven design code<br />
— Documentation, test plan, testbench<br />
— Identified & tagged requirements<br />
Design<br />
Block<br />
Test Plan<br />
FPGA<br />
Design<br />
Block<br />
(RTL Source)<br />
Design<br />
Block<br />
<strong>Requirements</strong><br />
Specification<br />
Embedded<br />
Tags<br />
Design<br />
Block<br />
Test Bench<br />
Embedded Tags<br />
Assumes<br />
— Consistent or standardized requirements tagging format<br />
— Non-overlapping requirement IDs<br />
21<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Referencing the Upstream <strong>Requirements</strong><br />
Target IP for new project<br />
References managed by ReqTracer to prevent the<br />
documents from having to be edited<br />
Design<br />
Block<br />
<strong>Requirements</strong><br />
Specification<br />
Design<br />
Specification<br />
Identifier<br />
Attributes<br />
References<br />
Description<br />
DS_02<br />
Priority : HIGH<br />
Covers : PR_02<br />
The design shall be power efficient<br />
Target to upstream<br />
FPGA requirements<br />
Determine if any<br />
requirements are<br />
missing or no longer<br />
needed<br />
— For the new project<br />
22<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
ReqTracer:<br />
Link Management<br />
23<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
<strong>Requirements</strong><br />
ReqTracer Summary<br />
24<br />
Automate tracking of requirements<br />
Automate report generation<br />
— Up to the minute status reports<br />
— Detail of overall project status<br />
Interactive visibility of the<br />
requirement coverage<br />
throughout all design data<br />
— Analyze potential problems<br />
& bottlenecks<br />
Traceability can span<br />
multiple design domains<br />
— ESL, RTL, PCB, etc.<br />
Helps compliance with<br />
safety standards<br />
— DO-254, DO-178B<br />
— ISO 26262<br />
System<br />
PCB<br />
SW<br />
FPGA<br />
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
© 2012 Mentor Graphics Corp. Company Confidential<br />
www.mentor.com
Change language