23/7/4:sb-pdt:not protectively marked copyright bae systems 2005 immortal information conclusions...

copyright BAE SYSTEMS 2005

Immortal Information 23/7/4:SB-PDT:Not protectively marked

Conclusions

Retention is a business issue

not an afterthought



Long Term Data Retention

Sean BarkerBAE SYSTEMS, Advanced Technology Centre

[email protected]

With thanks to LOTAR, AIA & PDES



Contents

• From Drawings to Models• Changes in IT Environment• Scope of the problem• Approches

– OAIS– LOTAR– Immortal Information



A Brief History of CAD

Manual Drawing

ProductModellingPart model includes shape,

materials, tolerances

GeometryModelling

Part shape is modelled to

produce drawings more easilyComputer as

Electronic pencil

Automated redrawing after small changes



What is the master?

Drawing is the masterManual Drawing

GeometryModelling

Computer asElectronic pencil

ProductModelling

Model as master



Contents

• From Drawings to Models

• Changes in IT Environment• Scope of the problem• Approches




Rates of Change

Life of CAD System: 10 years

Time between CAD Versions: 6 months

Life of Computer: 3 years

Life of Operating System: 18 months

Life of Product: 70 years +

time



An Example of Generation Change



Implications

When we update a model in 20 years time:• CAD System replaced twice• The hardware replaced 6 times

Given old software on an old computer, we need person who remembers how to use it.

Chances of reading old CAD data?



Contents

• From Drawings to Models• Changes in IT Environment

• Scope of the problem• Approches




Retention or Archiving?

Length of TimeLength of Time

Long TermMedium Term

Short Term

Long TermLong TermMedium TermMedium Term

Short TermShort Term

InvarianceInvariance

Digital SignatureDigital SignatureAuditable

Implicit

Not Required

AuditableAuditable

ImplicitImplicit

Not RequiredNot Required

ObjectivesObjectives

LO

NG

TE

RM

AR

CH

IVIN

GL

ON

G T

ER

M A

RC

HIV

ING

RE

TE

NT

ION

RE

TE

NT

ION

Legal Req.

Business Req.

Legal Req.Legal Req.

Business Req.Business Req.

Preserve OriginalKeep data available

ReusePreserve Source

Preserve OriginalPreserve OriginalKeep data availableKeep data available

ReuseReusePreserve SourcePreserve Source

Stored FormStored Form

Representation

Format

Detail Level

RepresentationRepresentation

FormatFormat

Detail LevelDetail Level

Native Format

Standardized Format

Accurate

Approximate

Presentation

Native RepresentationDerived Representation

Native Format

Standardized Format

Native FormatNative Format

Standardized FormatStandardized Format

Accurate

Approximate

AccurateAccurate

ApproximateApproximate

Presentation

Native RepresentationDerived Representation

PresentationPresentation

Native RepresentationNative RepresentationDerived RepresentationDerived Representation



Scope of the Problem

• Keep Hardware out of scope

• Keep Data OAIS Repository

• Keep Information LOTAR

• Keep Knowledge Immortal

Information



Contents

• From Drawings to Models• Changes in IT Environment• Scope of the problem

• Approches– OAIS– LOTAR– Immortal Information



OAIS Overview



OAIS

• Standard to compare Archive systems• Covers Producer to Consumer• Defines

– terms– processes– NOT data formats

• Ingest agreement



LOTAR

Developing European Aerospace Standard• Detailed guidance for

– CAD– PDM– etc (but later)

• Data Validation• Information Authentification

Harmonize with AIA (US Aerospace)



Key Issue - Retention is not an Afterthought

Design

ArchiveApprovalDecision

Fit toArchive

Usenow

Retention Integral to Design

Design

Archive

ApprovalDecision

Fit toArchive

UseNow

Archiving as Afterthought

Automatic, low cost, can be part of QA

Manual, high cost

Money downdrain



LOTAR, AIA, PDES and IAQG

7E7 - SSDBSAerospace Industries Association Working Group

Chair:Rick Zuray

7E7 - SSDBSAECMA-STAN LOTAR Working Group

Chair:Jean-Yves Delauney

7E7 - SSDBSPDES Inc. LDTR Working Group

Chair:Gerald Graves

Detailed working group structure

AQG Reps Airframe Defense & Space Regulatory Agencies Supply Chain Other

AAQG

APAQG

EAQG

Alenia

Airbus

BAE

Boeing

Canadair

Embraer

GAMA

Gulfstream

Raytheon

Fokker

Cessna

Bombardier

Vought

MTU

Mitsubishi

Kawasaki

Eurocopter

Pratt Whitney

Rolls Royce

GEEADS US DoD

NASA

NASDA

ESA NATO

Lockheed Martin

Northrop Grumman

EASA

FAA

JAA

JCAB

DAC

CAA

Transport Canada

LTDR Forum

International Aerospace Quality GroupLong Term Archival & Retrieval Project



Immortal Information

What should we archive?• What is the basic information?• What is the configuration information?• What is the context information?• What is the validity information?

What about the Rationale?



SGML

ASCITEXT

HTML

PDF

Basic File Formats

Example Retention Package

CADFile

ValidationProperties

ProjectStandards

Design OfficePractices

MaterialsHandbook

GD&TStandards

Supporting Documentation

10303-203AP 203 Ed 2

AP203Recommended

PracticesSTEPMod

10303-11Express

XML XSDXML Tag

Definitions

10303-21file

10303-28XML Binding

XML BindingConfiguration

STEP

File Format

CompanyProcess

DesignerApprovers

PersonnelRecords

QualificationsList

Proof of good practice



Conclusions

• Long term retention is a complex problem• OAIS covers the general concept of archiving• AIA & LOTAR specialise OAIS for Aerospace• LOTAR adds details for CAD, PDM, etc• Immortal Inforamtion will look at what should

be retained

Retention is a business issuenot an afterthought

23/7/4:sb-pdt:not protectively marked copyright bae systems 2005 immortal information conclusions...

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