■ Yin amfani da hanyar shuka ta spoon, ƙananan ƙimar lalacewar iri;

■ Na'ura mai aiki da karfin ruwa kwaikwayon, monopoly buɗe rami, ruwa filin ta hanyar jima'i mai kyau;

■ tsari sorting, iska watsa haske aiki mai kyau, anti-reversal aiki mai ƙarfi, tabbatar da high samarwa;

■ tsawon layi na zaɓi, tsawon layi mai daidaitawa, sarrafawa mai sarrafawa, ƙarfin amfani;

■ High aiki inganci, low farashi.