Greetings I have been using a web application for one of my business functions. Besides the limitation of it being a web application (the web is NOT as consistent nor as quick as is considered 'normal' for those that like in rural areas) there are to many areas where I need to tweak the results. Therefore I would like to re-create this application. At its base its somewhat like a recipe system. I plan on using postgresql for data holding and now what might be a good way of now doing the work. Think that an item has from 5 to 50 of 50 information fields. I am adding a number of items together and specifying quantities of each item trying to achieve levels that I previously specified. The present application uses css and javascript and some other things that are on the 'home' (program owner's) server. Hopefully this description is clear enough and gives enough information so that suggestions might be forthcoming. (I asked an engineer friend and his suggestion was to use a monte carlo type of system but that would be several levels more complex that I think might be necessary for this application.) Regards Dee