I'm nearly complete with an internship and am expected to do a presentation demonstrating the value I have provided for the company. I am a software developer and have helped to write a new data service that will be extremely valuable long term to the organization, and is a high priority for future growth. I've completed this task with a team, but it's fair to say I have done a non-trivial amount of work.
My question is, how do I estimate the value of what I've accomplished? I don't want to just make up arbitrary numbers? Has anyone used a methodology of estimating value in such a way that it is clear to management the benefit, while still being accurate and honest?
Further how do I translate that to real dollars?