A good factory delivers sustainable production of safe, reliable, and consistent products, while a bad factory will give random variations in the quality of products failing required norms and expectations.
A good factory is run via fool-proof and fail-safe systems, monitored by operators, whereas a bad factory is run unsystematically by operators, without historical logging.
A good factory meets food safety compliances and exceeds the quality of competition brands, while a bad factory fails on food safety compliances and is second choice to competition brands
In a good factory, the management focus is on the improvement of productivity, innovation, and growth, whereas in a bad factory, the management is always in firefighting mode to just keep the production running
A good factory is recognized as an industry leader and remains a leader for 15-25 years, and is easily expandable or upgradable. While a bad factory is recognized as poorly designed, and once constructed, expansion is problematic, and upgradation is unviable.
A good factory has teamwork, engagement and an inspirational work culture, whereas a bad factory lacks teamwork and the work culture resists any improvements.
Good engineering is like a good education. Like how good education leads to a higher quality of one's life, the quality of engineering in design and construction determines the quality of a factory throughout its operating life.