There is: Amdahl's law. Given a task, the maximum speedup by parallelization is limited, and dictated by its serial component. It's a simple model, it does not

There is: Amdahl's law. Given a task, the maximum speedup by parallelization is limited, and dictated by its serial component. It's a simple model, it does not include extra workload due to synchronization or extra workload due to setup cost of nodes (personnel integration, for example). However, it largely explains why teams become less efficient as they grow. Meetings are just one symptom.