Question: what are the cpars ratings?
Answer: CPARS Evaluation Rating Definitions under FAR 42.1503(h)(4)
(a) Exceptional. Performance meets contractual requirements and exceeds many to the Government's benefit. ... 
(b) Very Good. Performance meets contractual requirements and exceeds some to the Government's benefit. ... 
(c) Satisfactory. ... 
(d) Marginal. ... 
(e) Unsatisfactory.