It's not just projections or worries. Companies have real hard data, such as sales pipeline, inventories, orders etc. If your sales pipeline is down, inventory is stocking up, and your warehouse is idle compared to a year before, it is a manager's job to lay off employees.
a few interesting reports: https://www.reddit.com/r/StockMarket/comments/aydpbu/first_h... https://twitter.com/paulkrugman/status/1110161228507348992