The steps that managers must take to develop and maintain good working relationships with the unions that may represent employee interests are encompassed in .

Labor relations

Explanation:

Labor relations is a term used to describe the steps to make decisions that can benefit both employer and employee, thus will maintain a good relationship with the worker union. A worker doesn't only need a salary. There is some benefit besides financial, like the safety of working conditions, work hours, or way to do self-development. Knowing what the employee needs can help a business to have a more motivated and higher productivity worker.  

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