Due to some unavoidable circumstances like prolonged illness or accident, some of the RSSMs are not able to achieve the given targets even though they are capable of achieving those. In such exceptional scenarios, these RSSM can be given some fixed incentive amounts from humanitarian perspective.
Similarly there are some RSSMs who go beyond the bounds of duty and work extra hard. These RSSMs are encouraged and awarded for their hard work by giving extra incentives.
In some scenarios, some amount is deducted from the computed Incentive Amount to penalize RSSMs.
These scenarios are called Incentive Exceptions as RSSM are either given extra incentive or some amount is deducted from what is computed based on their achievements.