The 80:20 rule (Pareto principle) fits into this as well. You can make easy inroads into each individual project if things are divided up - getting any of them

The 80:20 rule (Pareto principle) fits into this as well. You can make easy inroads into each individual project if things are divided up - getting any of them to a viable state however starts to bog down. Productivity isn't linear. Especially when you mix in Tuckman's group dynamics.