Emails are one thing, but product QC results and related communications might well be retained for decades. Not just for liability reasons, but because trends

Emails are one thing, but product QC results and related communications might well be retained for decades. Not just for liability reasons, but because trends in process behaviour and performance can be observed and acted upon, and correlated with changes to suppliers, machinery, workers' shift patterns, and other factors. This can affect the bottom line.