parallelise development across multiple teams

At the core of parallel development, however, is the notion of flexibility. You have to write your code in such a way that you can incorporate newly discovered requirements into the existing code as painlessly as possible.

This allows you to execute multiple scripts in parallel.

Because we would eventually rebalance our test suite across many nodes, we would quickly hit a bottleneck. Our test suite would only be as fast as our slowest test file.