The trouble with “your credibility” is that you have no control over how other people see you.
90% of your credibility is based on “Meeting Your Commitments”.
Then you are judged on the quality of your work.
And lastly, do you make many mistakes and do you own up to them?
You can influence your credibility by doing the following:
Do what you say you are going to do and do it on time.
Do the best you can with the resource you have.
(Live these values in the workplace and you will become the Role Model of Credibility.)