Valavu yagulugufe wowotcherera ndi gawo lofunikira pakugwiritsa ntchito zosiyanasiyana pamapaipi azitsulo zosapanga dzimbiri pamakampani opanga zida zonse.Ndi ntchito yamanja kapena yodziwikiratu ya valve yaukhondo, yosavuta kugwiritsa ntchito m'malo osiyanasiyana.