Time management: Parametrize Work schedule rules and work schedules

I am parametrizing work schedule:

1.- I have a

daily work schedule

"V001" that has 3 different periods because the shedule is different.
- start 01.01.2007 end 10.06.2007 (8 hours per day)
- start 11.06.2007 end 09.09.2007 (6 hours per day)
- start 10.09.2007 end 31.12.2007 (8 hours per day)

2.- I have a

Period work schedule

"V01", it has only one week.

3.- I am parametrizing

Work Schedule Rules and Work Schedules

, the question is:

¿Should i create so many periods in "Work Schedule Rules and Work Schedules" like "daily work schedules"?

Thanks,

Itziar Gutierrez