Ṣiṣayẹwo olupese strapping PP nilo igbelewọn eleto ti awọn agbara iṣelọpọ, awọn eto idaniloju didara, ati igbẹkẹle pq ipese. Itọsọna yii ni wiwa awọn agbegbe igbelewọn bọtini meje: agbara iṣelọpọ, iṣakoso didara, ibamu iwe-ẹri, irọrun isọdi, atilẹyin imọ-ẹrọ, igbẹkẹle ipese, ati iduroṣinṣin owo. Loye awọn ifosiwewe wọnyi ṣe iranlọwọ fun awọn alamọja rira lati yan awọn aṣelọpọ ti o pese didara deede ati ipese igbẹkẹle.