Shaandhooyinka shiidaalku waxay leeyihiin nolol shelf ama waqti beddel ah oo lagu taliyay. Si kastaba ha ahaatee, wakhtigan shelf ama inta u dhaxaysa beddelka ma aha mid go'an oo waxaa saameeya arrimo kala duwan, oo ay ku jiraan qaabka baabuurka, tayada shidaalka, xaaladaha wadista, heerka dayactirka, iyo nooca shaandhada.
Guud ahaan marka la hadlo, inta u dhaxaysa beddelka filtarka shidaalka wuxuu ku salaysnaan karaa wakhtiga ama masaafada. Tusaale ahaan, moodooyinka qaarkood waxay ku talinayaan in la beddelo shaandhada shidaalka hal sano ka dib ama 8,000 kiiloomitir, laakiin tani waa kaliya tilmaamo adag. Xaqiiqda, haddii baabuurku isticmaalo shidaal tayo sare leh oo lagu wado xaalad wanaagsan, cimriga shaandhada ayaa laga yaabaa inay dheeraato. Taa beddelkeeda, haddii baabuurku isticmaalo shidaal tayadiisu hoosayso{6} ama lagu kaxayo xaalad xun oo waddo ah, filtarka ayaa laga yaabaa inuu si degdeg ah u ururiyo wasakhda, taasoo keenta hoos u dhac ku yimaadda hufnaanta sifaynta, oo u baahan beddelka hore.
Sidaa darteed, waxaa lagu talinayaa in milkiilayaasha baabuurku ay si joogto ah u hubiyaan xaaladda shaandhada shidaalka oo ay diyaariyaan jadwal beddel ah oo ku salaysan arrimo ay ka mid yihiin nooca baabuurka, tayada shidaalka, xaaladaha wadista, iyo heerka dayactirka. Haddii filtarku ay muujiso calaamadaha xidhidhiyaha ama hoos u dhaca waxtarka shaandhaynta, waa in isla markiiba la beddelaa si loo hubiyo in matoorka saxda ah uu shaqeeyo.
