a hierarchy of data,
this is a means of reporting data where lower level components are
aggregated. Roll-ups are helpful to:
Fig. Left - Example of a simple-view (roll-up) of the future events in a planning horizon. Right - a more detailed drill-down view.
Fig. The relationship between the long-range strategic plan and the shorter range tactical plan.
Fig. From a tactical plan (expressed in years) to an action plan (expressed in months).
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