Use the Time dimension and MDX functions to slice your data by time periods
Of the several misconceptions surrounding the Time dimension, one of the biggest is that an OLAP cube must have a Time dimension. The truth is that some OLAP applications, such as activity-based costing, don't have a Time dimension at all. Activity-based costing usually doesn't need a Time dimension because the costing is based on activity, not time. The second most common misconception is that ...