Jeremy has an inaccurate perception of what causes his work efficiency. He usually takes credit for completing his work on time, but blames his coworkers for his delays. Jeremy's biased evaluation of his work efficiency is best explained by

self-serving bias

Explanation:

The self-serving bias is explained as the tendency of people to assigning positive events to their own actions while assigning negative events to external factors. While this may mean deflecting personal responsibility for your actions, self-serving bias is a mechanism of defense that preserves your self-esteem. As per the question, Jeremy usually takes credit for completing his work on time but blames his coworkers for his delays and it is a perfect example of self-serving bias.