Effectiveness
Effectiveness is the level of results from the actions of employees and managers. Employees and managers who demonstrate effectiveness in the workplace help produce high-quality results. Take, for instance, an employee who works the sales floor. If he’s effective, he’ll make sales consistently. If he’s ineffective, he’ll struggle to persuade customers to make a purchase. Companies measure effectiveness often by conducting performance reviews. The effectiveness of a workforce has an enormous impact on the quality of a company’s product or service, which often dictates a company’s reputation and customer satisfaction.
Efficiency
Efficiency in the workplace is the time it takes to do something. Efficient employees and managers complete tasks in the least amount of time possible with the least amount of resources possible by utilizing certain time-saving strategies. Inefficient employees and managers take the long road. For example, suppose a manager is attempting to communicate more efficiently. He can accomplish his goal by using email rather than sending letters to each employee. Efficiency and effectiveness are mutually exclusive. A manager or employee who's efficient isn’t always effective and vice versa. Efficiency increases productivity and saves both time and money.