Smart manufacturing, also known as Industry 4.0, aims to improve manufacturing by integrating physical and digital systems. The researchers analyzed smart manufacturing systems to enhance flexibility, customization, quality, and productivity in manufacturing. They identified key technologies for intelligent manufacturing and reviewed policies and technology roadmaps from different countries. The study also addressed how small and medium enterprises can transition to smart manufacturing, compared key architectures, and suggested standards for Industry 4.0. The findings highlight the potential benefits and challenges of adopting smart manufacturing for the future of industrial revolution.