Simply put, a business case provides good reasons for an action, usually, an investment. So, an IT business case gives good reasons for investing in an IT project, product, or service. ...

This is a confused and confusing term. An ROI (done properly) analysis is the most important part of the business case. Return on investment is the core of a business case, ...

ROI is only part of a business case. It's the financial model component only.

Differences Subject scope . For a business case it is a project or initiative. For a business plan, it's a whole company or business unit. ...