I'm interested in knowing if any service providers or commercial data-centers have any publicly available information on what change management systems and methodologies they use with their engineering staff on production systems. I've discussed this directly with a couple of operators and I'm now interested in getting a larger outlook. More specifically, I'm interested in knowing how often blocking-type (i.e. group consent before change) change management is used vs logging type (i.e. recording the change during/after the fact so the change can be reverted, and for root cause analysis). Also, for blocking type change management, I'd like to know how people deal with process latency, emergency changes, approval group selection, etc (if indeed anyone uses consent to manage top-tier staff, I haven't found anyone so far that does). Thanks for any information.