ISO/IEC 27050-1:2019

INTERNATIONAL ISO/IEC
STANDARD 27050-1
Second edition
2019-11
Information technology — Electronic
discovery —
Part 1:
Overview and concepts
Technologies de l'information — Découverte électronique —
Partie 1: Aperçu général et concepts
Reference number
©
ISO/IEC 2019
© ISO/IEC 2019
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Published in Switzerland
ii © ISO/IEC 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 4
5 Overall structure and overview of the ISO/IEC 27050 series . 4
6 Overview of electronic discovery . 5
6.1 Background . 5
6.2 Basic concepts . 5
6.3 Objectives of electronic discovery . 6
6.4 Electronic discovery foundation . 7
6.4.1 General. 7
6.4.2 Competency . 7
6.4.3 Candour . 7
6.4.4 Cooperation . 7
6.4.5 Completeness . 7
6.4.6 Proportionality . 7
6.5 Governance and electronic discovery . 8
6.5.1 General. 8
6.5.2 Risk and environmental factors . 8
6.5.3 Compliance and review . 8
6.5.4 Privacy and data protection . 8
6.6 ICT readiness for electronic discovery . 9
6.6.1 General. 9
6.6.2 Long-term retention of ESI . 9
6.6.3 Maintaining ESI confidentiality . 9
6.6.4 Destruction of ESI . 9
6.7 Planning and budgeting an electronic discovery project . 9
7 Electronically Stored Information (ESI) .10
7.1 Background .10
7.2 Common types of ESI .11
7.2.1 General.11
7.2.2 Active data .11
7.2.3 Inactive data . .11
7.2.4 Residual data .11
7.2.5 Legacy data .12
7.3 Common sources of ESI .12
7.3.1 General.12
7.3.2 Custodian data sources .12
7.3.3 Non-custodian data sources .12
7.3.4 Potentially excluded sources of ESI .13
7.4 ESI representations .13
7.4.1 General.13
7.4.2 Native formats .13
7.4.3 Near-native formats .14
7.4.4 Image (near-paper) formats .14
7.4.5 Hardcopy .14
7.5 Non-ESI as part of discovery .14
8 Electronic discovery process.15
8.1 Overview .15
© ISO/IEC 2019 – All rights reserved iii

8.2 ESI identification .17
8.3 ESI preservation .17
8.4 ESI collection .17
8.5 ESI processing .18
8.6 ESI review .18
8.7 ESI analysis .18
8.8 ESI production .18
9 Additional considerations .19
9.1 Presentation of ESI .19
9.2 Chain of custody and provenance .19
Bibliography .20
iv © ISO/IEC 2019 – All rights reserved

Foreword
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the different types of document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject
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list of patent declarations received (see http:// patents .iec .ch).
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