Question the Mission

I have a Question that is more a research question than anything. There are no wrong answers.

What does a successful missions operation look like?

If we could somehow measure the success of ministry or impact on the mission field at home and abroad what are some factors to look at that measures success? If I wanted to find the Missions operations that were making the most impact, how would I measure it one from another. What makes one missions operation more successful than another? Is it wrong that I ask this question?

Sharing the experience,
Phil