(a) non-destructive testing

[keannu]

Source : self practice
[FONT=&#48148]If I find suspected points, I conduct (a) non-destructive testing. If I find out failure-causing points with equipment, I do destructive analysis with,,,

This might be a technical term, but I'm not sure whether to use "a" or not for "non-destructive testing".[/FONT]

 

[Tarheel]

I would say:

I conduct non-destructive testing.