ExxonMobil Singapore just had its redundancy exercise. The assessment criteria used is 30% past 3 years performance apprisal and 70% long term fit with company values.
The 70% is extremely qualitative where it is subjected to an individual's perspective/decision. List of individuals selected to be made redundant is made by 1 (max 2) person which means if the individual is in the good books of the decider, he/she is safe. That probably explains why no managers were let go (Manageral positions do not automatically equate to long term fit with company values). Supervisors were made redudant (be prepared for a corporate rebuttal that supervisors are also considered management).