WG1 – Terminology

Activities at November 2025

As reported in the Opening Plenary Session on Monday (November 10, 2025), a key objective of the meeting was to continue discuss and resolve the inputs / comments received from TC 56 members on the proposed amendments to the definitions of the identified terms in IEC 60050 – Part 192 Dependability (Last published in 2015).   More specifically, proposed Amendment # 6 together with the comments received were reviewed and discussed.   The objective of the discussion was to disposition the comments and to develop consensus on the modified definition of terms in Proposed Amendment #6.

The terms for which the amended definitions have been included in Amendment # 6 are as follows:

  • 192-01-43 risk <in dependability>
  • 192-02-03 operational availability vs achieved availability
  • 192-06-02 maintenance and 192-02-15 software maintenance
  • 192—01-xx obsolete, and obsolescence
  • 192-01-09 (life cycle)

Regarding 192-01-43, risk <in dependability>, after some discussion and debate, it was decided to poll the WG 1 members for the two alternative definitions provided including getting any other improvement suggestions.

Regarding 192-02-03, operational vs. achieved availability, it was decided to continue to work

In collaboration with Availability standard Project Team, to come to a common understanding for the definitions of the two terms. (Note: The Project team for Availability standard did not meet at this Tokyo meeting.)

Regarding 192-06-02, maintenance and 192-06-015, software maintenance, amendments were identified to establish consistency in the two definitions.  The amended definitions will be circulated to WG 1 members with the aim to get a wider consensus.

Regarding 192-01-xx, obsolete and obsolescence, consensus was established on the amended definitions.   (The words, “legislated changes” in the Notes are to be replaced by, “”social changes”.)  The consensus is included WG 1 members present and WG 3 convenor. The amended definitions will be sent to wider WG 1 membership to establish wider acceptance of the proposed amendments. 

Regarding 192-01-09, life cycle, the amended definition was found to be acceptable by those present.

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WG2 – Dependability Techniques

News at November 2025

WG2 is continuing to work on:

  • IEC 60300-3-5 – Application Guide – Test conditions and statistical test principles [MT31]
  • IEC 60300-3-11 – Reliability centred maintenance [MT29],
  • IEC 63142 – A global methodology for reliability data prediction of electronic components [PT 2.25],
  • IEC 61025 – Fault tree analysis (FTA) [MT26],
  • IEC 60300-3-2 – Dependability management – Part 3-2:Application guide – collection of dependability data from the field
  • IEC 60812 Analysis techniques for system reliability – procedure for failure mode and effects analysis (FMEA)
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WG 3 – Dependability Management and Systems

News at November 2023

Progress on work items
The following progress has been made on work items since the last Plenary:
MT21: IEC 62508 Human Aspects of Dependability.
A CDV has been sent to IEC and is currently being translated. It is expected to be issued very shortly

MT 23: IEC 60300-3-14  Dependability Management  Application guide – Part 3-14  Supportability and support
A CDV has been issued and comments received. It is hoped to Issue an FDIS early in 2024.

MT 14: – 60300-3-10  Dependability Management  Application guide – Part 3-10 Maintainability and Maintenance 
CDV has been sent to IEC and is currently being translated Comments on the CDV will be considered in online meetings.

MT 25: 60300-1 Dependability Management : Part 1. Managing dependability
This document was put on hold until the CDVs for 60300-3-10 and 60300-3-14 were issued because it needed to refer to these documents under their new titles. An FDIS has now been submitted to IEC. Some editorial is still being dealt with.

PT 3.27: 60300-3-17: Dependability Management Application guide – Part 3-17  Availability
PT 3.27 has met online several times since the last plenary. The final few comments on the previous CD have been resolved and a new CD will be issued shortly at the beginning of 2024.

MT 62198 IEC 62198 Managing risk in projects.
A CDV has been submitted to IEC and is expected to be issued shortly. Comments will be addressed in online meetings.

IEC 62402 Managing obsolescence
The revision of IEC62402 involves the development of three parts. Part 3 (Data repository and notice of change – Obsolescence exchange formats) Although this was agreed by TC 56 in principle the titles and scope of the three parts had not been formally approved. A DC was sent out and comments were received. The scopes were agreed at the 2023 Plenary.
Part 3 is based on existing British and German standards. Although a CD was expected to be issued in 2022 for Part 3, it has proved difficult to obtain consensus on some issues and discussions are still in progress.
Part 2 (Costing of Obsolescence) is a new document work on the WD is progressing. An estimated date for the CD will be available shortly.
Part 1 involves minor changes to the current obsolescence management standard to accommodate the new parts and the addition of Annexe on conformity assessment. This cannot commence until part 2 has reached CDV stage.

PWI 57-27 dependability in Production and operations
A WD covering dependability in production has been produced and additonal text for dependability in operations is being drafted.

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WG4 – Dependability Information Systems

News at November 2023

One meeting was held for discussing the PWI 56-25 Risk Analysis of Open Systems on 19 June 2023.The project continues to refine the PWI and prepare for NWIP and formal initiation of the project. Work has been going on to interact with ISO TC262 WG1.
MT 62628 Guidance on Software Aspects of Dependability, lead by Yu Min, Has not reported significant progress. The 56/2004/DC was circulated 11 August to 22 September 2023. The MT team will not meet during the 2023 plenary week.
PWI 56-26 Standardized Data Format for Mission Profiles lead by Goeran Jerke, has not reported significant progress. The project will meet shortly with the intent to attract further interest in the project. 

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