ISO 21505:2017

Project, programme and portfolio management – Guidance on governance

Published by: 2017-05-01 / 2017-05-01 / 28 pages

ISO 21505:2017 describes the context in which the governance of projects, programmes and portfolios is conducted and provides guidance for the governance of projects, programmes and portfolios. ISO 21505:2017 can also be used for assessment, assurance or verification of the governance function for projects, programmes or portfolios.

ISO 21505:2017 is intended for governing bodies and executive and senior management who influence, impact or make decisions regarding the governance of projects, programmes and portfolios. It is also intended to provide guidance to those who direct projects, programmes and portfolios, such as sponsors, steering committees, portfolio owners and the project management office.

It also can be used by project, programme and portfolio managers, as well as stakeholders involved in the development and implementation of projects, programmes and portfolios. Other audiences who can have an interest in this topic include those advising, informing, assisting or working within projects, programmes and portfolios.

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IEC/TR 63079 Ed. 1.0 en:2017

Code of practice for hearing-loop systems (HLS)

Published by: 2017-04-10 / 2017-04-10 / 103 pages
IEC TR 63079:2017(E) gives recommendations for and guidance on the design, planning, installation, testing, operation and maintenance of a hearing-loop system (HLS) intended for communicating speech, music and/or other signals. It is mainly concerned with HLS for hearing enhancement, in which the signals are communicated to users of hearing aids equipped with magnetic pick-up coils.
This document does not apply to induction-loop systems which use a carrier frequency, nor to other systems for hearing enhancement purposes which do not use magnetic induction.

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BS ISO 362-1:2015/CORR1

BS ISO 362-1:2015/Corr1 Measurement of noise emitted. M and N categories

Published by: 2015-01-31 / 2015-01-31 / 78 pages
BS ISO 362-1:2015/CORR1 specifies an engineering method for measuring the noise emitted by road vehicles
of categories M and N under typical urban traffic conditions. It excludes vehicles of category L1 and L2,
which are covered by ISO 9645, and vehicles of category L3, L4, and L5, which are covered by ISO 362-2.

The specifications are intended to reproduce the level of noise generated by the principal noise sources
during normal driving in urban traffic (see Annex A).

The method is designed to meet the requirements of simplicity as far as they are consistent with
reproducibility of results under the operating conditions of the vehicle.

The test method requires an acoustical environment that is obtained only in an extensive open space.
Such conditions are usually provided for

  • type approval measurements of a vehicle,
  • measurements at the manufacturing stage, and
  • measurements at official testing stations.

The results obtained by this method give an objective measure of the noise emitted under the specified
conditions of test. It is necessary to consider the fact that the subjective appraisal of the noise annoyance of
different classes of motor vehicles is not simply related to the indications of a sound measurement system. As
annoyance is strongly related to personal human perception, physiological human conditions, culture, and
environmental conditions, there is a large variation and it is, therefore, not useful as a parameter to describe a
specific vehicle condition.

NOTE 2 Spot checks of vehicles chosen at random are rarely made in an ideal acoustical environment. If
measurements are carried out on the road in an acoustical environment that does not fulfil the requirements
stated in this part of ISO 362, the results obtained can deviate appreciably from the results obtained using the
specified conditions.

Cross References:
ISO 1176
ISO 2416
ISO 5725
ISO/IEC Guide 98-3
IEC 60942
IEC 61672-1
ISO 362-2

Incorporates the following:

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IEC 60704-2-3 Ed. 3.0 b:2017

Household and similar electrical appliances – Test code for the determination of airborne acoustical noise – Part 2-3: Particular requirements for dishwashers

Published by: 2017-04-10 / 2017-04-10 / 25 pages
IEC 60704-2-3:2017 is intended to be used in conjunction with the third edition (2010) of IEC 60704-1, Household and similar electrical appliances – Test code for the determination of airborne acoustical noise – Part 1: General requirements.
The relevant text of Part 1 as amended by this standard establishes the test code for dishwashers.
This edition includes the following significant technical changes with respect to the previous edition:
a) it doesn’t contain the description of an appropriate test enclosure because the test enclosure has been incorporated in  IEC 60704-1:2010, Annex B;
b) the values of standard deviations of sound power levels determined according to this part are given in Clause 1;
c) to prevent an appliance being programmed to recognize the test cycles, and reacting specifically to them, in this new edition an artificial soil is used in addition to the unsoiled load and the rinse aid container has to be filled. This artificial soil successive may build up a film on the load. Therefore, detergent also has to be used. An initial test has shown that no foam is to be expected.
This publication is to be read in conjunction with IEC 60704-1:2010.

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Managing Higher Voltages in Aerospace Electrical Systems

Published by: 2017-04-03 / 2017-04-03 / 41 pages

This SAE Aerospace Information Report (AIR) considers the issue of proper design guidance for high voltage electrical systems used in aerospace applications. This document is focused on electrical discharge mechanisms including partial discharge and does not address personnel safety. Key areas of concern when using high voltage in aerospace applications are power conversion devices, electrical machines, connectors and cabling/wiring. The interaction between components and subsystems will be discussed.

The AIR is intended for application to high voltage systems used in aerospace vehicles operating to a maximum altitude of 30000 m (approximately 100000 feet), and maximum operating voltages of below 1500 VRMS (AC)/1500 V peak (DC). These upper voltage limits have been incorporated because this report focuses on extending the operating voltage of non-propulsive electrical systems beyond that of existing aerospace systems. It is noted that electrical systems for electrical propulsion may consider operating voltages beyond 1500 VAC/DC.

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