Which of the following are characteristics of engineering decision making?

$[2$ marks$]$

i$.$ Engineers cannot design a perfect system that will have no future problems

ii$.$ Engineering designs can be checked by multiple engineers to ensure that structures, machines

and processes will function as specified

iii. Most times, not all information is available for making decisions, and as such assumptions

have to be made using good judgement

iv$.$ Engineers are futuristic, and as such when making decision, the useful life of the system being

designed must be considered.

i$.$ ii and iv only

ii$.$ ii only

iii. ii$,$ iii and iv

iv$.$ All of the above