An innovation that is disruptive allows a whole new population of consumers at the bottom of market access to a product or service that was historically only accessible to consumers with a lot of money or a lot of skill
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Interest: do you think about it in your free time and bring it up in random conversations? Importance: will it benefit others? Contribution: do you have something novel to add? Source: AdamGrant
Simply put, these are factors that lead to satisfaction and motivate employees to work harder. Examples might include enjoying your work, feeling recognized and career progression.
The Pygmalion effect is a psychological phenomenon wherein high expectations lead to improved performance in a given area.
In economic terms, there is a diminishing marginal benefit. This is related to the law of diminishing returns: each additional hour of effort, each extra worker is adding less “oomph” to the final result. By the end, you are spending lots of time on the minor details.