Customization - DynaChange
Epicor's Prophet 21 utilizes a technology family - DynaChange. Dynachange includes Screen Designer, Portals and Business Rules.
Grey Wolf has been developing in all three technologies for years now and can fill in where your internal IT staff does not either have the time or the expertise.
This is especially the case with Business Rules. Business Rules utilize C# and Visual Studio which is typically beyond the scope of most internal IT departments.
DynaChange effort by Grey Wolf is billed on a time and material basis. Rates can utilize a Block of Time Agreement.