More than 10 years of implementing Oracle BI solutions is a long time. We cannot say how many reports we created ourselves during this time frame or how many custom build analyses we reviewed. But we are sure that you always have different possibilities to set up a report. Some of them are quite the best, others are not.
Based on this Oracle BI expert knowledge and experience in building analyses we designed an Oracle BI Expert Seminar for end users to give you more insights on how to manage efficient report implementation. Participating "Oracle BI Analyses Insights for End Users with Gerd Aiglstorfer" will give you guidance on smart usage of Oracle BI.
Knowing the BI tools themselves is fine ... but knowing how to use them is much more better!