Preventive Maintenance Resource Requirement

Dear Srini and Team,

Please find my requirement

we have 177 activities to be defaulted to Preventive Work order's ,But resource will not be the same at every time due shift changes

Hence we decided not to default the resource's ,Instead we are defaulting only operation seq Number and other fields except ,resource and required hours

user can't manually enter the resource requirement for more operation at the same time i can't default resource from activities ,since resource may frequently changed

1.Any option to enter required resource details for all operation in single shot in the work order

or any suggestion to handle this requirement