SAP BusinessObjects Business Intelligence platform can be thought of as a series of conceptual tiers.
1. Client tier
2. Web tier
3. Management tier
4. Storage tier
5. Processing tier
6. Data tier

Steps shows the interaction of platform components when a user logs on to BI launch pad.

STEP 1: On Web Client a login request is generated and passed to Web Application server through web server.
STEP 2: After determining login request username, password and authentication type is passed to Central Management Server (CMS) for authentication.
STEP 3: CMS Validated Username and Password against the appropriate Database.
STEP 4: User session is created by CMS
STEP 5: CMS Lets Web application server know about successful validation
STEP 6: Web Application server creates logon token for the session and generates next page a
STEP 7: WPS send next web page to web server
STEP 8: Web server sends web page to the web client.