It’s easy-are your projects being completed? Your customers happy? Have you created or improved something that brings quantifiable value?
Your projects are completed but this is not a set of math problems. How were they completed? Did you get advice and input from other people? How many ways could your project fall apart under stress?
And I have known sales men who had very happy customers, until about six months down the line.
Have you created or improved something that brings quantifiable value?
Defined as......?
And how many people actually do "created or improved something" even once in their work life? Most people spend their time making sure all the little things happen that results in something coming out the other end that works.
They don't invent anything new but they keep the wheels spinning.