This presentation discusses the key building blocks of a business case and the steps needed to assemble them into a meaningful instrument to communicate the value proposition of an initiative.
This guide to writing good business cases first discusses what is a good business case and then describes the process for creating one with numerous references to resources for creating business cases.
This guide is focused on the process more than the content of an investment business case. It provides templates and examples to illustrate the business case preparation and approval process. You will have to sift through some situation specific information to leverage this document but it is worth it.