What do you mean by 'defensible'? Aren't all business cases defended by the writer and her/his associates?

Some of the least defensible business cases ever written have been defended and sold to unsuspecting executives by smooth talking employees and PowerPoint presenters. By ‘defensible’ I mean that the case document, carefully researched and written in logical flow with powerful key points made clearly renders a case defensible on its own. This means the reader should have an “oh no” moment reading the current state intro; have an “oh I get it” moment most of the way through and have...

Some people say that some business case writers create the executive summary first, others do it last. Does it matter?

To me it does matter but I can understand the sentiment of writing a summary first. As dealt with in my book, Demystifying Business Cases ... I explain why the summary is better and much more easily written last. It is simply that A) upfront you do not know yet what the case summary at the executive one-page level is going to highlight and B) the smart way to write the executive summary is to lift the most powerful sentences and points out of the other seven sections to merge them into a flow...

“A sense of KPIs or Key Performance Indicators should accompany any business case so you’ll know if you got what you bought”
– Greg Duffy 2013