I don't understand the use of "personal preference". Personal preference applies IMO to things that I like without really thinking it through. Things like how I take my coffee. It rarely applies to technical matters.

For instance, if someone says it's their personal preference to put big half inch gobs of solder when assembling a circuit board that doesn't mean he's doing the right thing.

>Personal preference.
>BTW I don't see weekdays function related to Payroll screen. I mean classes that are really related.

I know they are not related. That doesn't stop people from coding it that way. Things get lumped together BEFORE any real thought goes into the organization.