I was studying for the DP-900 exam recently and in one of the Microsoft resources, I ran across this quote: "Historical data is equally important, to give a business a more stabilized view of trends in performance." This was in context of looking at database performance, but it would apply to any part of your business.

The world has changed dramatically in the last two years. In early 2020, at this point, I was finalizing work and getting ready for a sabbatical from work. I managed to get the last sabbatical before the world shut down and most people didn't see the value of one during a pandemic. I returned from sabbatical, with a trip planned to the UK in early March that I canceled. Since that time, I can't imagine the quote above applies to the airlines' business. I've flown a bit across the last year, but rarely for work. I suspect most of their models and ideas about how to manage their business had to dramatically change.

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