Newport's principle that a tool should be adopted only if its positive impact on core factors of success and happiness substantially outweighs its negative impact — opposing the default any-benefit approach that adopts tools for any marginal gain.
The craftsman's approach to tool adoption is Newport's operational framework for evaluating whether a technology should be integrated into a knowledge worker's workflow. It opposes what he calls the any-benefit approach — the default stance that holds a tool should be adopted if it offers any possible benefit to any aspect of professional or personal life. The craftsman's approach applies a higher standard: the positive impact on the core factors determining success and happiness must substantially outweigh the negative impact. Applied rigorously, it eliminates the majority of tools that knowledge workers currently use, because most tools offer marginal benefits that are individually plausible and collectively devastating. In the AI age, the approach requires a shift from selection (adopt or not) to workflow design (how, when, for what purposes).