I know this has been discussed plenty of times here but I have searched for an answer as to why this is a bad idea with no luck. Microsoft actually has a tutorial on how, why, and when to use multiple values at table level. I simply want a combo box on my form that allows me to pick multiple projects which a component is used on. My inventory screen allows user to create a new part. It is so simple to just make a "Project" field in my "Inventory" table which allows multiple values. Then my form would show this as a combo box with muliple values which would allow users to check individual boxes for each project the component is used on. My query criteria for report X would then be display components if "projects" contains X. Then I could copy/paste forms and change the X to Y or Z and my reports all stay simple and easy. Can anyone tell me why this is a bad idea and if so, how to accomplish my goals otherwise. I have tried to make a junction table with just the projects listed but I can't figure out how to select multiple project on my form. I don't really want to use a subform if I don't have to. Thanks for any input.