“Sometimes, job performance does play a role, too; for example, if a company has to fire one-third of its sales force, those with the lowest numbers will almost certainly be more on the chopping block than those with higher numbers.” - https://work.chron.com/decides-employee-gets-laid-off-12311....
“Nondiscriminatory employee selection criteria should be developed and used to select the employees who will be laid off. Common factors used to identify criteria are seniority, redundant roles, skills based criteria or other clearly delineated standards. Performance criteria may be used and employers may consider previous performance reviews and other performance documentation” - https://www.shrm.org/resourcesandtools/tools-and-samples/hr-...
“Microsoft Uses Layoffs to Push Underperforming Employees Out” - https://www.businessinsider.com/microsoft-layoffs-managers-p...
“They will often assess the work performance of team members and rank them against their coworkers using a curve (a practice known as stack ranking) in order to retain the top performers, all while identifying and weeding out lower performers.” - https://www.dice.com/career-advice/how-companies-decide-who-...