We are in the process of building a solution based on BW on HANA with a green field approach. Everything is new. The first goal is to deliver KPIs from data extracted from ECC and enable flexible reporting for power users.
So far our approach has been to use BEx queries to feed the data to Dashboards (Xcelsius) via BICS. Also BEx super queries have been created containing every KPI in scope, so in the future (in theory) a dashboard can be easily connected to this query when using a KPI on a new dashboard is needed.
I'd like to validate if this approach is OK, since we've had internally several discussion regarding the need og having BEx queries: some are of the opinion that they're needed in order to leverage new OLAP in memory abilities and other are of the opinion that with Calculated and Analytic views is enough to get the job done to feed the dashboards.
Also, som are of the opinion that BEx queries are still there just to provide backwards compatibility on non green field instalations: e.g. migration from BW to BW on HANA.
Your opinions are hihgly appreciated.