The Performance Management Revolution

Review “The Performance Management Revolution” and answer the following questions.
https://hbrorg/2016/10/the-performance-management-revolution
1, Who created a merit-rating system to flag and dismiss poor performers during WWI? 2, To follow the natural cycle of work, what do many companies want to do? 3, If companies stop using numerical methods of performance appraisal, what are they worried about happening?