[aa10ll]

Why do you have that perception of yourself? Are you sure that management perceives you that way? It sounds suspiciously like the kind of paranoia that would come from working in a toxically competitive, non-collaborative environment.

[PopeOfNope]

I have that perception because I'm currently on my company's version of performance probation. In my company, the engineering manager sets the estimate and the programmers are expected to at least come close. In my case, the time it takes me to complete a task is around 5x greater than the original estimate.