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Kimball, on the other hand, favors the development of individual data marts at the departmental level that get integrated together using the Information Bus architecture.
Even calling it a schism might be overstated, as Inmon in the foreword for called Kimball’s seminal work “…one of the definitive books of our industry.by Paul Williams The relational database revolution in the early 1980s ushered in an era of improved access to the valuable information contained deep within data. It was soon discovered that databases modeled to be efficient at transactional processing were not always optimized for complex reporting or analytical needs.In fact, the need for systems offering decision support functionality predates the first relational model and SQL.On the other hand, access to company information on a large scale by an end user for reporting and data analysis is relatively new.Within IBM, the computerization of informational systems is progressing, driven by business needs and by the availability of improved tools for accessing the company data.” [and] “It is now apparent that an architecture is needed to draw together the various strands of informational system activity within the company.Inmon feels using strong relational modeling leads to enterprise-wide consistency facilitating easier development of individual data marts to better serve the needs of the departments using the actual data.
This approach differs in some respects to the “other” father of Data Warehousing, Ralph Kimball.
Both approaches remain core to Data Warehousing architecture as it stands today.
Smaller firms might find Kimball’s data mart approach to be easier to implement with a constrained budget.
End-user access to this warehouse is simplified by a consistent set of tools provided by an end-user interface and supported by a business data directory that describes the information available in user terms.”In addition to Big Blue’s innovations, the onset of the 1990s saw two industry pundits gear up for further advances in the nascent world of Data Warehousing.
Bill Inmon, the Father of Data Warehousing Considered by many to be the Father of Data Warehousing, Bill Inmon first began to discuss the principles around the Data Warehouse and even coined the term in the 1970s, as mentioned earlier.
IBM Europe, Middle East, and Africa (E/ME/A) has adopted an architecture called the E/ME/A Business Information System (EBIS) architecture as the strategic direction for informational systems.