400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2002-01-0476 Model-Based Architecting for Reliability, Availability, and Maintainability Software in Automotive Applications Jong Min Choi, Il Sang Yoo and Young Won Park Ajou Univ. Joong Yong Park Institute for Advanced Engineering Reprinted From: Electronic Engine Controls 2002: Electronics and Information Gathering (SP–1690) SAE 2002 World Congress Detroit, Michigan March 4-7, 2002Downloaded from SAE International by Stony Brook Univ, Sunday, August 12, 2018The appearance of this ISSN code at the bottom of this page indicates SAE’s consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition,however, that the copier pay a per article copy fee through the Copyright Clearance Center, Inc. OperationsCenter, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sections 107 or108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying forgeneral distribution, for advertising or promotional purposes, for creating new collective works, or forresale. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department.To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wr itten permission of the publisher. ISSN 0148-7191 Copyright © 2002 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is published inSAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 3 00 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in theGlobal Mobility DatabaseDownloaded from SAE International by Stony Brook Univ, Sunday, August 12, 20182002-01-0476 Model-Based Architecting for Reliability, Availability, and Maintainability Software in Automotive Applications Jong Min Choi, Il Sang Yoo and Young Won Park Ajou Univ. Joong Yong Park Institute for Advanced Engineering Copyright © 2002 Society of Automotive Engineers, Inc. ABSTRACT The importance of defining requirements correctly in the development process of software is well known in software industry. Since RAM(Reliability, Availability, and Maintainability) is a significant effectiveness element for the operation of automotive engine, it requires a thorough analysis during the design and testing of an engine. In this study, user requirements for the calculation of RAM and RG(Reliability Growth) were identified and documented by using a Model-Based Systems Engineering (MBSE) tool, RDD-100. The tool supports the traceability of each function to the corresponding requirement. Requirements were organized into behavior items such as RAM calculations, display, and data query and into non-behavior items such as input, output, and environment conditions. Additional requirements were derived if new functions are needed in the software even if the originating requirements did not exist in the early stage of the software development. Scenarios that describe the analysis of RAM and RG of the automotive engine were constructed to explain the activity and data flow among users, RAM software, and engine database. The top-level architecture of this so