Hosting
It's well worth considering the implications of various hosting options because if developers can't easily access the environments they need, then this will reduce their agility. They may have to work around an availability problem and end up using insufficient or unsuitable hardware, which will hamper progress and cause future maintenance problems. Or their work will simply be blocked and delivery set back.
Unless you are a very large organization, hosting in-house is generally a bad idea for reliability, flexibility, and cost reasons. Unless you have some very sensitive data, then you should probably use a data center.
You can co-locate servers in a data center, but then you need staff to be on call to fix hardware problems. Or you can ...
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