changing the daily work schudle through PCR

Dear All,

My period work schedule is: Mon - Fri -Night shift and Saturday and sun day is off day)

so my client requirement is, if an employee worked all 05 nights (Mon to Fri) then Saturday and Sunday is off day.

but if an employee got one day absence then Saturday should be working day?

I suggest to go for the substitution method but my client wont like to go for manual work. they are expecting which should be happen automatically.

My question is. can i convert the daily work schedule (offday) in to working day (night shift) via PCR?

actually im expecting to change the daily work schedule class (offday to night shift) via PCR

can any one help me in this.

Manjula