Abstract
Data warehousing is achieving huge importance in all businesses around the world. Data warehousing is commonly used by companies to analyze trends over time. In other words, companies use data warehousing to view day-to-day operations, but its primary function is facilitating strategic planning resulting from long-term data overviews. From such overviews - business models, forecasts, and other reports and projections can be made. In the world where data warehousing is gaining so much importance, it becomes necessary to study the factors that hinder its efficiency. These problems have to be studied in detail to isolate the reason of their existence. The aim of this project is to understand these issues affecting the data warehousing efficiency. Understanding these issues will help us to design better data warehouses in the future.