The key personnel management divided into four main parts, the first which is, operations manager, who is responsible for the planning, organizing, overseeing employees' performance, and taking corrective actions when necessary.Not to mention the process takes time and energy because it involves multiple activities that aren't easy to perform, for instance, selecting a segment of the market to deliver marketing efforts toward their needs.Furthermore, operations manager has to maintain long-term relationships with suppliers, spot areas for improvement either in increasing efficiency or reducing costs.