It doesn't work well for management with MBA background. These guys want to have all excel spreadsheet cells filled in upfront. And more important, there must b

It doesn't work well for management with MBA background. These guys want to have all excel spreadsheet cells filled in upfront. And more important, there must be someone to blame for bad estimates in case of any problems. In corporate environment it is more important to have your ass well protected, than to speed shareholders many reasonably.