The respective supervisors graded the staff based on their performance for the year.
These grading were calibrated by a group of senior management staff.
The CEO told a senior manager to choose three staff in his department to downgrade their appraisal from B2 to C1 as the quota for B2 for the department is reached.
The manager had no choice but to downgrade one of the staff even though he fully deserved the B2 grading.