Toooftenthosewhodevelopandmodifysoftwareandthosewhomanagesoftwaredevelopmentareliketrainstravelingdifferentroutestoacommondestination.Themanagerswanttoarriveatthecustomer’sstationwithanacceptableproduct,onscheduleandwithinbudget.Thedeveloperswanttodelivertotheusersatrainloadoffe