A mattress encasement with improved bed bug protection includes an encasement body configured to cover a mattress and a zipper disposed at an opening in the encasement body and movable between an open condition permitting insertion and removal of the mattress and a closed condition preventing bed bugs from traversing the zipper. The filling machine fills a plurality of bottles with a predetermined amount in weight of an article through associated ones of a plurality of valves. The message is comprised of one or more symbols, each being associated with predetermined signal characteristics. The method may further include calculating a significance score for the system anomaly, and determining that the system anomaly relates to a real system problem based on the calculated significance score.