Journal of System Safety, eEdition An official publication of the System Safety Society, Inc., a non-profit corporation incorporated in the District of Columbia.   Article Submission | Advertising | Subscriptions & Membership | Copyright   Journal of System Safety eEdition is published twice yearly by the System Safety Society for the transmission of technical material and news of topical interest to those associated with the practice of system and product safety. Information, recommendations, statements and opinions expressed herein are those of the individual authors and advertisers, and do not necessarily represent those of the System Safety Society. Certain material is published for the purpose of stimulating independent thought on controversial matters or on problems of vital concern to safety professionals. Although caution is taken to ensure accuracy, the publishers or editors cannot accept responsibility for correctness or accuracy of the information presented.   ARTICLE SUBMISSION Journal of System Safety welcomes article submissions from its readers. Technical manuscripts and news items of interest should be sent to: Niles T. Welch, JSS Technical Editor c/o ASWaterman Inc. P.O. Box 249, 190 Taunton Ave. Seekonk, MA  02771-0249  USA Email: jss@aswaterman.com Authors should include the following: (1) one typewritten copy of the manuscript, double spaced; (2) a PC or Mac disk in Microsoft Word, Adobe PageMaker or ASCII format; (3) a statement of copyright ownership; (4) a short (one paragraph) author profile; (5) the author's name, address, daytime phone and fax number, email address, affiliation and professional status. For more information on submissions, please email jss@aswaterman.com. All submissions are subject to peer review. If authors wish to have their materials returned, they should send a specific request, along with a self-addressed, stamped envelope.   ADVERTISING POLICY Journal of System Safety welcomes advertising compatible with the objectives of the System Safety Society, subject to the approval of the Technical Editor. The acceptance of advertising does not imply endorsement by the Society or Journal of System Safety. For information on advertising rates and submission guidelines, please contact: Niles T. Welch, ASWaterman Inc. P.O. Box 249, 190 Taunton Ave. Seekonk, MA 02771-0249  USA Tel: 508-336-8879, ext. 112 Email: jss@aswaterman.com   SUBSCRIPTION AND MEMBERSHIP INFORMATION For information on subscription rates and membership, contact: System Safety Society P.O. Box 70 Unionville, VA  22567-0070 USA Tel: 540-854-8630 Fax: 540-854-4561 Email: syssafe@ns.gemlink.com Web: www.system-safety.org   Copyright © 2003 by the System Safety Society. All rights reserved. The double-sigma logo is a registered service mark of the System Safety Society. Journal of System Safety and the System Safety Society name are registered service marks of the System Safety Society. Other corporate or trade names may be trademarks or registered trademarks of their respective holders. (ISSN-0743-8826)