"Discuss" is a general term meaning to talk about something in detail. Use "discuss" when:
* You are introducing a topic for the first time.
* You want to have a general conversation about something.
* You are not implying that the topic has already been partially discussed.
"Discuss further" implies that the topic has already been discussed to some extent, and you want to continue the conversation in more detail. Use "discuss further" when:
* You have already briefly touched upon the topic.
* You want to delve deeper into specific aspects of the topic.
* You want to clarify or expand upon previously discussed points.
Here are some examples:
* Discuss: "Let's discuss the new project plan." (This is the first time the topic is being brought up)
* Discuss further: "We need to discuss further the challenges we encountered during the pilot phase." (The pilot phase has already been discussed, and you want to focus on the challenges)
In summary:
* Discuss: General conversation, new topic.
* Discuss further: Continued conversation, deeper analysis, expanding on existing discussions.