A common practice in any development team is to conduct code reviews, or at least it should be. This is a process where multiple developers inspect written code and discuss its design, implementation, and structure to increase quality and accuracy. Whether you subscribe to the notion of formal reviews or a more lightweight method (such as pair programming), code reviews have proven to be effective at finding defects and/or insufficiencies before they hit production.
In today’s world of readily available apps, whether on your phone or a cloud service, consumers do not expect a lot of training before starting to use them. Apps are designed to be intuitive and lead you through them in the way that you would expect them to work – as it relates to the purpose of the app. Same is true with analytical applications. The best ones are intuitive – they look familiar and are intuitive to navigate.