SimSoft Working Group

Rev:03ARINC 610 Analogy Article1. Introduction1.1. [[What:]][[Text in double square brackets – [[text]] – is by the author and is intended for editorialreview, not for inclusion in the published article.]][[This introduction is written primarily so that comment can be sought from outside of theWorking Group and consequently explains some of why this is being done. However, anIntroduction IS required for the section as it is an unusual inclusion in an ARINC documentand so needs some explanation.]][[In some cases, explanatory text has been included that is not strictly part of the analogyexample. While the content/meaning of the extra text may exist in other sections of ARINC610, it was felt important in covering some simulation terms to include further examples orexplanatory text to give a more complete explanation.]]1.2. [[Who:]][[This is written principally by Colin Bascombe of Oxford Aviation Academy (formerlyknown as GCAT Flight Academy) as member of the ARINC 610 Working Group andcomment is welcomed from all.]]1.3. Why:During discussions at the Working Group meeting, where representatives from avionicsmanufacturers, aircraft systems manufacturers, aircraft manufacturers, simulatormanufacturers, and simulator users were present, it quickly became apparent that commonterms used by the different groups can mean different things to each group and that terms incommon use and well understood in the simulation industry are confusing to those in otherindustries where the term either does not exist or is used in a different context.Further to this, several aircraft manufacturers advised that they spend considerable time andeffort each time they commission an item of avionics or aircraft system explaining ARINC610, its terms and its consequences, to their suppliers because the suppliers are notsimulator-aware and do not understand the simulation terms being presented.During an ARINC 610 Working Group discussion, a delegate used an analogy to illustrate aproblem – he talked of the differing effects of Total Freeze and Flight Freeze on a beer tap.It was apparent that by the use of this analogy there was a much better and, possibly moreimportantly, a common understanding of these terms among the delegates.It was decided that a section be written that used analogy to try to explain the fundamentalterms used in ARINC 610.The problem that the use of analogy is attempting to ease can best be appreciated by usingan analogy:10 July 08 Page 3 of 28