Paper Abstract and Keywords |
Presentation |
2022-12-15 14:30
Metric for Dependability/Risk and Functional Safety Ko Kawashima (ORIENTAL MOTOR), Yoshinobu Sato (Institute of Healthcare Quality Improvement, Tokyo Healthcare Fo) R2022-44 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
The risk due to malfunctioning of safety functions performed by electrical/electronic/programmable electronic safety-related systems (S-RSystem) can be assessed based on a number of risk metrics such as mean time to demand and mean time to completion, as well as mean operating time to failure and mean time to restoration of an item which are main characteristics of dependability. The basic safety standard of IEC 61508 defines currently Safety Integrity Level (SIL) for safety functions performed by S-RSystem in functional safety by use of the target failure measures derived from those dependability metrics only. The IEC 61508 requires independence between the multiple S-RSystems that are parts of an overall system because the target failure measures for SIL can be provided based on the assumption of this independence. However, in recent years, more complicated systems have appeared and cannot meet the requirement of independence. This paper presents the concrete example of such S-RSystems, and demonstrates the inadequateness of the target failure measures. Then the comprehensive measures for determination of SIL based on the concept of risk metric are proposed to enable the SIL to be allocated appropriately to such multiple S-RSystems. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Dependability / Risk Metric / Functional Safety / Hazardous Event Rate / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 122, no. 315, R2022-44, pp. 1-6, Dec. 2022. |
Paper # |
R2022-44 |
Date of Issue |
2022-12-08 (R) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
Download PDF |
R2022-44 |
Conference Information |
Committee |
R |
Conference Date |
2022-12-15 - 2022-12-15 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Online |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Reliability International Standard, Maintainability, Reliability General, Safety General |
Paper Information |
Registration To |
R |
Conference Code |
2022-12-R |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Metric for Dependability/Risk and Functional Safety |
Sub Title (in English) |
|
Keyword(1) |
Dependability |
Keyword(2) |
Risk Metric |
Keyword(3) |
Functional Safety |
Keyword(4) |
Hazardous Event Rate |
Keyword(5) |
|
Keyword(6) |
|
Keyword(7) |
|
Keyword(8) |
|
1st Author's Name |
Ko Kawashima |
1st Author's Affiliation |
ORIENTAL MOTOR CO., LTD. (ORIENTAL MOTOR) |
2nd Author's Name |
Yoshinobu Sato |
2nd Author's Affiliation |
Institute of Healthcare Quality Improvement, Tokyo Healthcare Foundation (Institute of Healthcare Quality Improvement, Tokyo Healthcare Fo) |
3rd Author's Name |
|
3rd Author's Affiliation |
() |
4th Author's Name |
|
4th Author's Affiliation |
() |
5th Author's Name |
|
5th Author's Affiliation |
() |
6th Author's Name |
|
6th Author's Affiliation |
() |
7th Author's Name |
|
7th Author's Affiliation |
() |
8th Author's Name |
|
8th Author's Affiliation |
() |
9th Author's Name |
|
9th Author's Affiliation |
() |
10th Author's Name |
|
10th Author's Affiliation |
() |
11th Author's Name |
|
11th Author's Affiliation |
() |
12th Author's Name |
|
12th Author's Affiliation |
() |
13th Author's Name |
|
13th Author's Affiliation |
() |
14th Author's Name |
|
14th Author's Affiliation |
() |
15th Author's Name |
|
15th Author's Affiliation |
() |
16th Author's Name |
|
16th Author's Affiliation |
() |
17th Author's Name |
|
17th Author's Affiliation |
() |
18th Author's Name |
|
18th Author's Affiliation |
() |
19th Author's Name |
|
19th Author's Affiliation |
() |
20th Author's Name |
|
20th Author's Affiliation |
() |
Speaker |
Author-1 |
Date Time |
2022-12-15 14:30:00 |
Presentation Time |
25 minutes |
Registration for |
R |
Paper # |
R2022-44 |
Volume (vol) |
vol.122 |
Number (no) |
no.315 |
Page |
pp.1-6 |
#Pages |
6 |
Date of Issue |
2022-12-08 (R) |
|