Human Resource: progressive disclipline procedure - major problem, minor problem

What are some pros and cons of progressive discipline in general, and should I agree or disagree with the following two statements on progressive discipline:

--- 1 major problem every 2 months may lead to termination sooner than 1 minor problem every month.

--- 1 minor problem every month may lead through the steps of progressive discipline to termination, whereas 1 major problem may result in a written warning and repeating the same problem the next year may only result in another written warning.