Whendevelopersdocumentthearchitectureoftheirsystems,theyofteninventtheirownspecificwaysofarticulatingstructures,designs,concepts,anddecisions.Whattheyneedisatemplatethatenablessimpleandefficientsoftwarearchitecturedocumentation.arc42byExampleshowshowit'sdonethroughseveralreal-worldexamples.Eachexampleinthebook,whetheritisachessengine,ahugeCRMsystem,oracoolwebsystem,startswithabriefdescriptionoftheproblemdomainandthequalityrequirements.Then,you'lldiscoverthesystemcontextwithalltheexternalinterfaces.You'lldiveintoanoverviewofthesolutionstrategytoimplementthebuildingblocksandruntimescenarios.Thelaterchaptersalsoexplainvariouscross-cuttingconcernsandhowtheyaffectotheraspectsofaprogram.