subject oriented, integrated, time variant, non update-able collection of data used in support of management decision making processes
an integrated and consistent store of subject-oriented data that is obtained from a variety of sources and formatted into a meaningful context to support decision-making in an organization
pool of data (database) to support decision making  current and historical data of potential interest to managers  -subject oriented -consistent formatting -time-series -end users don't update (nonvolatile)