Sentence:  In this program if a processor becomes idle, then all feasible activities requiring that kind of processor will be <WSD>candidated</WSD> for scheduling. If the number of candidates is more than the number of available processors, activities with higher priority ... 
Meaning of the word marked with <WSD> tags:  To make or name (something) a candidate (for use, for study as a next project, for investigation as a possible cause of something, etc).