Often when we seek to implement a Business Intelligence deployment we’re faced with the question. To OLAP or not to OLAP? If you don’t know what OLAP is, you’ve come to the right place. Not only are we going to explain what OLAP is, we’re also going to discuss where it might be appropriate, and where you might want to avoid it. Now I am going to use some terms like dimensions, measures, and hierarchies, which we explain in an earlier video.