In a high quality setup you have a staging server that is a carbon copy of PROD. Bonus points if you make it so staging and PROD are 100% interchangeable, to the level that you can point PROD to staging, and then turn PROD into staging, and do the same next deployment. If you can do that, you have a stronger change of at least reproducing production issues.
Dev, UAT / QA, Staging, PROD. This is the ideal setup in my eyes. It lets QA / UAT hold changes that are maybe not 100% ready, while not blocking testing that is mean to go into PROD ASAP because it can sit in staging.
Dev, UAT / QA, Staging, PROD. This is the ideal setup in my eyes. It lets QA / UAT hold changes that are maybe not 100% ready, while not blocking testing that is mean to go into PROD ASAP because it can sit in staging.