My first Publication Agile-Data-Warehouse-Design-eBook | Page 304

I keep six honest serving-men
(They taught me all I knew);
Their names are What and Why and When
And How and Where and Who.
I send them over land and sea,
I send them east and west;
But after they have worked for me,
I give them all a rest.
…
—Rudyard Kipling, The Elephant’s Child
Time for a DW/BI Retrospective