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The Life Model

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  1. The Life Model Paul Wheatley Digital Preservation Manager The British Library

  2. 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

  3. 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

  4. LIFE Model v1.0 Lifecycle Stage Lifecycle Elements

  5. 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)

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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?

  11. 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

  12. Costing approaches vs aims Useful approach Difficult to achieve aim with this approach Probable useful approach / some uncertainty / lack of evidence

  13. 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

  14. 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

  15. Looking ahead: “LIFE3”? Estimative models for each stage of the lifecycle Creation or Purchase Acquisition Ingest Metadata Creation Bit-stream Preservation Content Preservation Access

  16. Questions...? Paul Wheatley Digital Preservation Manager The British Library paul.wheatley@bl.uk www.life.ac.uk