ISO INTERNATIONAL STANDARD 24678-1 First edition 2019-03 Fire safety engineering Requirements governing algebraic formulae : Part 1: General requirements Ingenierie de la sécurite incendie - Exigences regissant les équations algebriques Partie 1: Exigences geénérales Reference number ISO 24678-1:2019(E) ISO @ IS0 2019 IS0 24678-1:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 24678-1:2019(E) Contents Page Foreword ..iv Introduction. 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Requirements governing description of physical phenomena 4.1 Fire phenomena to be considered in calculation .2 4.2 Scenario elements .2 4.3 Interactions between phenomena. .2 5 Requirements governing calculation process .2 5.1 Selection of an appropriate method. .2 5.2 Procedure. 2 5.3 Separate clause 2 5.4 Definition of variables 2 5.5 Scientific basis .2 5.6 Examples. .2 6 Requirements governing limitations .3 6.1 Quantitative and/or qualitative limits on application .3 6.2 Limits on the use in a numerical method. .3 7 Requirements governing input parameters .3 7.1 Identification of input parameters. .3 7.2 Sources of input parameters. .3 7.3 Valid range of input parameters 3 7.4 Consistency with other part of assessment .3 8 Requirements governing domain of applicability .3 Bibliography 4 @ IS0 2019 - All rights reserved iii