Rationaletouse: Facts not usually in dispute, evidence is typically in writing; summary proceeding, no discovery or trial. Usually faster, simpler, cheaper than an action
Opinion, advice, direction of court on question affecting rights of a person in respect of administration of the estateofa deceased person or execution of a trust
Removal or replacement of one or more executors, administrators or trustees, or fixing of their compensation
Determining rights under deed,will,contract, or other instrument by interpretation