AUTO EXECUTE "Generate Preventive Maintenance Work Orders" EAMPMSDU

Any one can help me  to execute the "Generate Preventive Maintenance Work Orders"  EAMPMSDU concurrent request every 7 day automatically.

Product                 : Enterprise Asset Management R11i

Activity                  : Want to schedule the "Generate Preventive Maintenance Work Orders"  EAMPMSDU process.

Parameter Value    : Start Date =should be current date automatically

                               Cut Off Date = should be 7 days Plus of Start Date automatically