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The Life Model Paul Wheatley Digital Preservation Manager The British Library Summary and aims Summary Introduction to the LIFE Model and a recap of LIFE Model v1.0 Development of the LIFE Model v1.1 Looking ahead to LIFE Model v2.0 Scope of lifecycle costs and aims of costing

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the life model

The Life Model

Paul Wheatley

Digital Preservation Manager

The British Library

summary and aims
Summary and aims
  • Summary
    • Introduction to the LIFE Model and a recap of LIFE Model v1.0
    • Development of the LIFE Model v1.1
    • Looking ahead to LIFE Model v2.0
    • Scope of lifecycle costs and aims of costing
    • LIFE Methodology
    • Generic Preservation Model
    • Future work: LIFE3?
  • Aims:
    • Summarise recent developments in the LIFE approach and costing tools
    • Provide a foundation for the Case Study discussions later today
    • Highlight some outstanding issues for discussion and debate
introducing the life model
Introducing the LIFE Model
  • Map of the digital lifecycle
  • Standard way of representing the key functions in a lifecycle
  • Mappings required from each unique lifecycle to the LIFE Model
  • Provides sufficient detail to enable useful analysis of lifecycles
  • Remains broadly high level to ensure relevance across different lifecycles and content types
  • Enables like with like comparison between different lifecycles
life model v1 0
LIFE Model v1.0

Lifecycle Stage

Lifecycle Elements

reviewing and refining the model
Reviewing and refining the Model
  • Feedback from a variety of sources:
    • Feedback from the LIFE1 Conference
    • Results of LIFE1 Case Studies
    • Feedback from third parties
    • Review by independent economics consultant
    • Mappings to related standards (OAIS, DRAMBORA, Cedars)
  • Internal review and production of LIFE Model v1.1 (Nov 07)
  • Further comment and feedback:
    • Feedback from LIFE2 Conference
    • Results of LIFE2 Case Studies
    • Feedback from third parties
    • Other lifecycle work (DCC Lifecycle Model, “Keeping Research Data Safe” JISC Study)
  • Production LIFE Model v2.0 (August 08)
developing the life stages

Acquisition

Ingest

Metadata

Access

Storage

Preservation

Creation or Purchase

Acquisition

Ingest

Metadata

Creation

Bit-stream Preservation

Content Preservation

Access

Developing the LIFE Stages

LIFE Model V1.0

LIFE Model V1.1

life model v1 1 stages and elements
LIFE Model v1.1: Stages and Elements

Lifecycle Stage

Creation or Purchase

Acquisition

Ingest

Metadata

Creation

Bit-stream Preservation

Content Preservation

Access

Lifecycle Elements

....

Selection

Quality Assurance

Re-use Existing Metadata

Repository Admin

Preservation Watch

Access Provision

....

Submission Agreement

Deposit

Metadata Creation

Storage Provision

Preservation Planning

Access Control

....

IPR & Licensing

Holdings Update

Metadata Extraction

Refreshment

Preservation Action

User Support

....

Ordering & Invoicing

Reference Linking

Backup

Re-ingest

Obtaining

Inspection

  • Check-in
life model v1 1 sub elements
LIFE Model v1.1: Sub-elements
  • Ensuring the Model is clear and unambiguous to apply:
    • Detailed definitions
    • Sub-element descriptions
  • Sub-elements are suggested functions or activities only
life model v1 1 to 2 0 key issues to resolve

Metadata

Creation

Re-use Existing Metadata

Metadata Creation

Metadata Extraction

LIFE Model v1.1 to 2.0 – key issues to resolve

Lifecycle Stage

Creation or Purchase

Acquisition

Ingest

Metadata

Creation

Bit-stream Preservation

Content Preservation

Access

Lifecycle Elements

....

Selection

Quality Assurance

Re-use Existing Metadata

Repository Admin

Preservation Watch

Access Provision

Scoping, Reqs, Repair

....

Submission Agreement

Scoping, Reqs, Repair

Metadata Creation

Storage Provision

Preservation Planning

Access Control

....

IPR & Licensing

Deposit

Metadata Extraction

Refreshment

Preservation Action

User Support

....

Ordering & Invoicing

Holdings

Update

Backup

Re-ingest

Disposal

Obtaining

Inspection

Reference Linking

Disposal

  • Check-in
scope lifecycle or none lifecycle cost
Scope: Lifecycle or none-Lifecycle cost?
  • LIFE1: concept implicit but not explicit
  • Lifecycle costs are directly related to functions applied to the content considered in a particular lifecycle. Eg:
    • Purchase of content
    • Deposit of content into a digital repository
    • Quality assurance of the content
    • Preservation action to migrate from one file format to another
  • Non-Lifecycle costs are supporting functions or miscellaneous costs not directly related to lifecycle activities. Eg:
    • Management
    • Repository software
    • Electricity costs
    • Buildings/accomodation costs
  • How do we define this scope?
aim of costing digital preservation activity
Aim of costing digital preservation activity
  • Assessment of the various practical aims or purposes of costing digital preservation activity
  • Assessment of the usefulness of costing approaches for each aim
  • Two key approaches considered:
    • Audit: a top down assessment of all infrastructure, staff and other costs associated with a digital repository. As demonstrated by the Dutch National Archives, Digitale Bewaring Project, http://www.digitaleduurzaamheid.nl/bibliotheek/docs/CoDPv1.pdf
    • Lifecycle Costing: a bottom-up lifecycle costing of activities relating to a particular content stream. As demonstrated by the LIFE Project, http://www.life.ac.uk
  • Results useful for:
    • informing adopters of where each approach will be useful
    • decision making on scope of lifecycle and non-lifecycle costs
costing approaches vs aims
Costing approaches vs aims

Useful approach

Difficult to achieve aim with this approach

Probable useful approach / some uncertainty / lack of evidence

methodology
Methodology
  • A clearly defined step by step approach to costing a lifecycle
  • Provides guidance on how the LIFE Model should be applied
  • Standard approach to ensure consistency between studies of different lifecycles
  • Key aspects include:
    • Developing a process flow diagram
    • Mapping to the LIFE Model
    • Assessing function/activity costs
    • Scope of lifecycle and non-lifecycle costs
    • Assessing recurrent and non-recurrent costs
    • Generating estimates of future lifecycle costs
  • The Methodology will be published end of August 08
generic preservation model

Cost

Estimation

Tool

Basic Content Profile

Predicted Lifecycle Cost

Organisational policy

Generic Preservation Model
  • No data available to assess in LIFE1 Case Studies
  • Generic Preservation Model created to estimate the costs of Content Preservation
  • Review conducted to refine, fix known issues and incorporate feedback from LIFE1 Conference (May/June 08)
  • Review by experts group led by Chris Rusbridge
  • Generic Preservation Model V2.0 to be released at the end of the Project
looking ahead life3
Looking ahead: “LIFE3”?

Estimative models for each stage of the lifecycle

Creation or Purchase

Acquisition

Ingest

Metadata

Creation

Bit-stream Preservation

Content Preservation

Access

questions
Questions...?

Paul Wheatley

Digital Preservation Manager

The British Library

[email protected]

www.life.ac.uk

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