1. Ngosipụta: etinyere na OPB, panel ngosi matrix ntụpọ uhie, ọkwa ọdụ olu agbakwunyere, ọrụ nkwukọrịta bọtịnụ.2. Enweghị ngosipụta: arụnyere na OPB, na-ejikọta ọkwa ọdụ olu na ọrụ nkwukọrịta bọtịnụ.