Nowadays job candidates are expected to quantify the impact of their work on resumes. (E.g. "Increased team work productivity by X percent" or "Automated 500 reports with SSRS, saving 100 man hours a month.")
How do companies verify such figures on a resume?
Currently I've worked on a project and I know that assignment had an impact of X percent in the team but my manager doesn't know that because he doesn't keep track of that. He simply knows that productivity "went up." Now he has left the company. I want to list that on my resume and but no one could back me up on that claim.