This guide serves as a comprehensive resource on Selective Laser Sintering (SLS) and Fusion Sintering (FS), two primary types of polymer Powder Bed Fusion (PBF) technologies. It outlines the essential considerations for selecting the appropriate PBF technology based on production needs. The document begins by discussing the unique challenges faced when integrating additive manufacturing into traditional production environments, emphasizing the importance of understanding production requirements and capabilities. Key questions to evaluate include the type of production, acceptable throughput, material requirements, part sizes, software connectivity, and available human resources. The guide details the decision-making process between SLS and FS, highlighting their respective advantages and operational characteristics. It also addresses the materials available for each technology, noting that SLS offers a broader range of materials compared to FS. The guide concludes with insights on the operational differences between the two processes, emphasizing the importance of process control and material selection in achieving production goals.