I thought I had it figured out, but soon realized I had no idea. I'm new to Access and having a lot of trouble figuring out the right layout for my database. My company tests metal samples. The attatched excel book shows the main categories as well as what information is in each category. The oxidation samples and alloy columns are both information about the metal sample. The other three are tests we run on each sample. Just so you understand, the sample comes from a tube, which comes from a lot, which comes from an ingot, which comes from an alloy. How would you guys go about laying out the database and what relationships should be in place? I'm sorry if this is confusing. Let me know if there is something I can better explain, or if I'm completely unclear. Thanks!