discuss what are the top three issues you think important to remember and share with newbie’s of DW

Please discuss what are the top three issues you think important to remember and share with newbie’s of DW and why? For example, “express data at the lowest details possible” because this allows “the maximum flexibility and extensibility.” Please think over this and then post them on the discussion board with brief justifications. Conduct a search or talk with DW professionals in your friend circle, find out what are the top Data Cleansing Companies? What are their specialties? The underlying theme for almost any IT evolution is standardization. How this is reflected in data warehousing design ? I hope you could give some thoughtful comments on this question and share your thoughts with the class. http://www.kimballgroup.com/category/business-intelligence-and-data-warehouse-articles/