https://online.pointpark.edu/public-administration/policy-making-cycle/
see also
https://www.sciencedirect.com/topics/social-sciences/policy-process
https://www.cliffsnotes.com/study-guides/american-government/public-policy/the-policymaking-process
http://www.ncchpp.ca/docs/modeleetapespolpubliques_en.pdf