How do you determine your launch success metrics? What kind of tools do you use to track them?

In full transparency, I have found it difficult to evaluate the success of a product launch in a metrics-driven way. There's too many variables at play. For example, one could use the metric of "how much of Product X did we sell in the first six months after launch?", but that can be influenced by the product quality, competitors' moves, broader trends, etc. You may have had a great product launch for Product X, but Product Y happens to do better in the market for other reasons.

One metric that is useful is to survey the satisfaction of your internal customers as well as your actual customers regarding how they feel a particular product launch went. If you use an NPS survey, that can be tracked over time, and I find that that'll probably give you the clearest sense for what you may have missed in a given product launch or what you did well.