To determine the 2019 Best Workplaces in Manufacturing & Production, Great Place To Work® analyzed anonymous survey feedback representing over 150,000 employees working in the Manufacturing & Production industry in the United States.

Employees responded to over 60 survey questions describing the extent to which their organization creates a Great Place To Work For All™. Eighty-five percent of the evaluation is based on what employees say about their experiences of trust and reaching their full human potential as part of their organization, no matter who they are or what they do. Great Place To Work analyzes these experiences relative to each organization’s size, workforce make up, and what’s typical relative to their peers in the industry.

The remaining 15 percent of the rank is based on an assessment of all employees’ daily experiences of innovation, the company’s values, and the effectiveness of their leaders, to ensure they’re consistently experienced.

To be considered, companies had to meet the Great Place To Work-Certified standard. To ensure survey results truly represent all employees, Great Place To Work requires that Trust Index© survey results are accurate to a 95% confidence level with a 5% margin of error or better. We review any anomalies in survey responses, news and financial performance to ensure there aren’t any extraordinary reasons to believe we couldn’t trust a company’s survey results. Companies with 10 to 999 people were considered for the small and medium category; companies with 1,000 employees or more were considered for the large category, and those that appear on Fortune’s 100 Best Companies to Work For list are ranked first.