What method should a manager use to accurately measure employee performance in the following occupations? Secretary, engineer, directory assistance officer.

Managers should use the MBO method to accurately measure employee performance in the following occupation, secretary, engineer, and directory assistance officer.
Management by Objectives (MBO) is a process in which a manager and an employee agree upon a set of specific performance goals, or objectives, and jointly develop a plan for reaching them. The objectives must be clear and achievable, and the plan must include a time frame and evaluation criteria. For example, a salesperson might set a goal of increasing customer orders by 15 percent in dollar terms over the course of a year.
MBO is primarily used as a tool for strategic planning, employee motivation, and performance enhancement. It is intended to improve communication between employees and management, increase employee understanding of company goals, focus employee efforts upon organizational objectives, and provide a concrete link between pay and performance. An important factor in an MBO system is its emphasis on the results achieved by employees rather than the activities performed in their jobs
The principle behind management by objectives is to make sure that everybody within the organization has a clear understanding of the objectives of the organization.
Also being aware of their roles and responsibilities.

It is intended to improve communication between employees and management, increase employee understanding of company goals, focus employee efforts upon organizational objectives, and provide a concrete link between pay and performance. An important factor in an MBO system is it put emphasis on the results achieved by employees rather than the activities performed in their jobs.

The concept of MBO involves: * Specific