Boxir2 is a reporting based analysis so BO will use OLAP for its report analysis OLAP consists of summarized and analysed data which is static and based on this reports are generated.
Its a DOLAP solution because the cache is built dynamically either on desktop in case of DeskI or on enterprise server in case of WebI. We can also say it as a ROLAP because it BO provides automatic drill through to detail server based ranking aggragate navigation.