This Question Trigger Map is a helpful procurement (and general purpose) tool to ensure all of the Who, What, When, Where, Why, Which, and Hows are answered.
(Feel free to save and print a copy of the below Question Trigger Maps for your own purposes. They are very helpful for triggering questions and getting the full story on any procurement process, issue, etc.)
Below is one filled out for the topic of Spend Analysis, with a few gaps where you can add further questions that are triggered in your procurement mind!
(Feel free to save and print out a copy)
(Acknowledgements: Map drawn using the mapping tool 'MindNode' application from the Mac Store)