Mine is being used in a big company and we impose the necessity of having to do code review before pushing our code. So if we don't hear from those whom we have included in the CR (code review), we nag them till they do so or notify others that you're stuck because you haven't received any code review on the changes you've made.
a.k.a. Vite Phoenix and Vite Zeus... Proud member and co-founder of OlympianZ