"Power Quality" is the science applied when standard electrical methods are unsuccessful at investigating and mitigating the damaging effects of a poor electrical supply and/or improving the quality of the supplied power.
The above are only a few examples of faults and malfunctions attributed to poor power quality and the reasons investigations and surveys are carried out.
'Bad' power is not the only reason such faults or malfunctioning can occur within complex electronic devices. It requires more than just the 'right equipment' to tell the difference.
Two avenues are available to determine if power quality issues exist: