One can always improve a department by defining processes – look at every aspect of production process and clearly define and streamline processes.
Always hire qualified candidates who possess the qualification, knowledge, skill and experience. Furthermore, always provide in house training to sharpen skill set and transfer knowledge form best employees to new hires. Candidates should be able to understand and adhere to exact specification of company’s processes
Create repeatable processes and last but not the least, if absolute success was attained using a specific process one should maintain the said process and tweak process when needed without a complete overhaul