Greetings Jay,
Please see the following configuration node:
SPRO > Plant Maintenance & Customer Service> Maintenance and Service Processing > Maintenance and Service Orders > Functions and Settings for Order Types > Define Change Docs, Collective Purc. Req. Indicator, Operation No. Interval.
Disable the "Collective purchase requisition" indicator for your desired Order type. This will create a separate Purchase Requisition for each of your ops.
See some more useful info here: Single Purchase requisition from plant maintenance order - Toolbox for IT Groups