To keep your team at its most effective, aim for 70 percent of your people to be in the sweet spot of their learning curve at any given time.
When natural constraints have dissolved, you may consciously impose constraints of time, money, expertise, and buy-in. These forces can help bring to the fore the resourcefulness that stimulates innovation.
Increased ease can be accompanied by a loss of momentum. Provide stretch assignments and the real possibility of failure to reintroduce the friction that is a natural feature of beginning on a new learning curve.
Sweet-spot employees are easy to forget about because everything is working. Remember to show that you value them.