by trial and error


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Adv.1.by trial and error - in an empirical manner; "this can be empirically tested"
References in periodicals archive ?
Ultimately, process engineers were able to reduce lead time and avoid further casting process design by trial and error. Casting process modeling also allowed the cast wheel to be produced 2.5 times faster than the initial design.
Profile dies, however, are still mainly designed by trial and error using methods that have changed little over the past 40 years.
I learned all the skills I have today by trial and error," says Wight, who confesses he dropped out of highschool and went straight into the workforce.