Writing an effective S/4HANA business case is both a science and an art. As a business and digital transformation specialist, this continues to be my most important takeaway.
The science part is relatively easy to handle. SAP provides you with tools and you probably have your own that you devise and use such as metrics and KPIs which assist you determine the quantitative aspects of what you want out of S/4HANA.
Art is the more difficult aspect since no two customers are alike. You can't use a one size fits all approach. I approach each business case discussion with a minimum set of success factors or criteria. Here are a few of the key components: