Can a PM work center operation be split without assigning to individuals?

We have a requirement to split the work time of a PM operation into more than one non-consecutive time period. For example a maintenance trade work center containing 3 individuals is required to perform an operation that takes 40 hours. Due to the plant schedule the work will be carried out in 20 hour segments. 20 hours in week 5 and 20 hours in week 7. Can this operation be dispatched as a split without assigning the splits to individuals in the work center?

We are using: SAP Appl Release 470 and

SAP R/3 Enterprise PLM, SCM, Financials Release 110 and the latest support packs.