There is a big difference between poor timekeeping and selling the company's secrets or stealing its computers.
You could classify some offences (for example, inappropriate dress) as misdemeanours; some (for example, poor timekeeping, smoking in prohibited areas, less serious breaches of health and safety rules) as misconduct, and some (for example, violence, drunkenness, sexual harassment) as gross misconduct which merits instant dismissal - which, however, must also be implemented through the correct procedures (see Gross Misconduct). You might also want to include another category for repeated misdemeanours (for example, persistent poor timekeeping).
