Icyuma gisobekeranye ni igice cy'icyuma cyashyizweho kashe, gihimbwa, cyangwa cyarakubiswe kugirango habeho igishushanyo cy'imyobo, ahantu, hamwe nuburyo butandukanye bwiza. Ubwoko butandukanye bw'ibyuma bikoreshwa muburyo bwo gutobora ibyuma, birimo ibyuma, aluminium, ibyuma bitagira umwanda, umuringa, na titanium. Nubwo inzira yo gutobora yongerera isura ibyuma, ifite izindi ngaruka zingirakamaro nko kurinda no guhagarika urusaku.

Ubwoko bwibyuma byatoranijwe kubikorwa byo gutobora biterwa nubunini bwabyo, uburebure bwa gipima, ubwoko bwibikoresho, nuburyo bizakoreshwa. Hano hari imbogamizi nke kumiterere zishobora gukoreshwa kandi zirimo umwobo uzengurutse, kare, umurongo, hamwe na mpandeshatu, kuvuga amazina make.