Ovex the past decade, artificial intelligence conceptsand techniques have been applied to many aspects of manufacturing, ranging from product and process development, to production management, to process diagnosis and quality control. Planning technology will play an important role in the future of intelligent manufacturing, especially in factory automation systems. Drawn from our experiences on automation in the manufacturing domain, we present lessons learned as well as issues arisen in order to successfully employ planning technology in this real world domain. We primarily focus on the execution environment, and discuss how plan generation and execution impact each other. A preliminary approach is described.