Mei he ʻaho ʻo hono fakatau ʻo e ngaahi tefitoʻi naunau synthetic, te ke lava ʻo fiefia ʻi he taʻu ʻe 1 hili e ngaue tokoni ʻa e fakapapauʻi lelei, ka ʻoku fie maʻu ke ke muimui ki he ngaahi tefitoʻi moʻoni ko ʻení:
1. Lava ʻo fakaʻaliʻali ʻetau kaati maluʻi ʻoku kei ʻaonga.
2. ʻOku ʻikai ke fakatahatahaʻi ʻa e koloa, fakaleleiʻi pe toe fakafonu ʻiate ia pe, pea ʻoku kei tuʻu maʻu pe ʻa e QC fakaʻilonga.
3. ʻI he taimi ʻoku fakaʻaongaʻi ai e koloa ʻi he tuʻunga angamaheni, ʻoku ʻi ai ha ngaahi palopalema lelei.