My reasons for discipline are never vague or arbitrary. I can accurately describe to the student or parent:
The rule(s) that the student has broken
The consequences of the student's misbehavior.
Yes it's a commitment that's time consuming to prepare, but
I find it well worth the effort as it saves me time and energy in the future. These are preventative actions that puts parental involvement on the right track from the first day of school and they set the stage for a full year of positive parental involvement.