Ok Kengkaj I agree what you said, so business delegate will have some business service to be invoked ny its claints, in that case why cant a session bean which acts as a Session facade inovoke the Business delegate to avail a business service please explain. Please note the below point which I have taken from the
http://java.sun.com/blueprints/corej2eepatterns/Patterns/BusinessDelegate.html
"Finally, it should be noted that this
pattern could be used to reduce coupling between other tiers, not simply the presentation and the business tiers"
Thanks,
Kumar