Standard project release cycles build to a design specification, clearly defining phases of what is acceptable and when.

https://en.wikipedia.org/wiki/Technology_readiness_level

One way to enforce implementation convergence is to define core unit tests before coding even begins. If people just ignored communication, the results are rather predictable.

https://en.wikipedia.org/wiki/Conway's_law

Building something that doesn't need patched every week is impossible for some. =3