That’s called persistent starting, and it can be a valid strategy for overcoming things like executive dysfunction.

Oftentimes, the hardest part of a task is simply starting it. So persistent starting basically says “tell yourself it’s okay to quit after [x]”. Have a sink full of dishes to wash? It’s okay to stop after you only wash two cups. The whole sink may be daunting, but two cups is much more manageable. So starting becomes easier. And chances are good that you’ll go “eh, my hands are already wet. Might as well wash the rest while I’m here.” Now the dishes are done, even though you only set out to wash two cups.