I have tried to capture all essential things that different stakeholders in a software development project need to keep-in-mind for successful execution. If one does a careful study, s/he can find that there is nothing new mentioned here except for few best practices followed in agile style of software development. Its just a easier way to capture, convey and enforce. If we follow these few and simple things, most of our development projects can be saved. 
If the image is not clear, please try to access the image URL directly.
What You Said