Ask HN: What slows down dev teams?

I'm a Developer that's started to study software development teams, and I'm looking to understand what are the most common restraints to shipping more software faster. I'm trying to collect some data on this, so if you're interested in seeing a report on this in a few weeks I'd appreciate some more insights, and there's only a few simple questions: https://www.surveymonkey.com/r/PS8BP3S I'm also happy to answer any questions or discuss more in the comments, this topic has brought up a lot of points on other websites that I don't account for in my survey.