There are many benefits to keeping employees happy in the workplace. Just one of these is the potential for higher production.
Most employees take great pride in their work. This is just 
one instance in the workplace that can contribute to employees’ happiness.
Fortunately, there are several steps that can be taken to create a happy work environment, and, in turn, increased productivity.
Workflow
The first thing that has to be looked at is workflow. Work has to be distributed as evenly as possible.
If one worker feels they are being overloaded when another seems to have much less work, this can create tension.
Balancing workflow will make every employee feel as though he or she is being treated the same.
The Right Tools
No employee can be happy or productive if they are not 
given the right tools to work with. No matter what is being produced, there will be equipment and tools that are essential.
If the company invests in these as needed, it sets the worker up for success. This creates a positive attitude, which will be reflected in higher production.
Training and Education
Usually when an employee is hired, part of this is based on their education and the skills they have. As they grow in the company, more expectations may be placed on them.
Most employees will welcome this, as they want to progress within the company. However, if proper training and education is not provided as needed, you will see the opposite effect.
In this case, employees will feel unhappy and unsettled and they will not be productive.
Trouble-Shooting
In general, most employees will not complain directly to 
management; rather, they tend to grumble among themselves. But a negative attitude on the part of one employee can have a ripple effect on all other workers.
Management, therefore, must put itself in a position in which employees feel they can voice their opinions and grievances.