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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

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The life model l.jpg

The Life Model

Paul Wheatley

Digital Preservation Manager

The British Library


Summary and aims l.jpg

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


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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


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LIFE Model v1.0

Lifecycle Stage

Lifecycle Elements


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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)


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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


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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


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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


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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


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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?


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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


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Costing approaches vs aims

Useful approach

Difficult to achieve aim with this approach

Probable useful approach / some uncertainty / lack of evidence


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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


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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


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Looking ahead: “LIFE3”?

Estimative models for each stage of the lifecycle

Creation or Purchase

Acquisition

Ingest

Metadata

Creation

Bit-stream Preservation

Content Preservation

Access


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Questions...?

Paul Wheatley

Digital Preservation Manager

The British Library

paul.wheatley@bl.uk

www.life.ac.uk


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