www.accpac.com (formerly SBT) has a manufacturing version. So does www.accountmate.com. I've used SBT for several jobs, but just the AR / AP / GL, which can be isolated easily enough with relatively few points of intersection. The source code, if you buy it, is not pretty. Some odd constructs left over from FoxBase+, etc., but it generally does work in my experience. The Accountmate code I've seen was more modern and clear. There are pluses and minuses as always. There are also lots of third-party add-ons, if the base packages don't have the features you need.