One of the fundamental principles in precision machines related to precisions is that of determinism. System behavior is fully predictable even to nanometer-scale motions. Design for assembly (DFA) is a process by which products are designed with ease of assembly in mind. If a product contains fewer parts it will take less time to assemble, thereby reducing assembly costs. In addition, if the parts are provided with features which make it easier to grasp, move, orient and insert them, this will also reduce assembly time and assembly costs for a machine shop in Toronto.
The reduction of the number of parts in an assembly has the added benefit of generally reducing the total cost of parts in the assembly. This is usually where the major cost benefits of the application of design for assembly occur. Most products are assembled manually by a machine shop in Toronto and the original DFA method for manual assembly is the most widely used method and has had the greatest industrial impact throughout the world.
A module is a detachable or nondetachable grouping of parts. The characteristic feature of a module is that it can be assembled apart from the other elements of the final product. A combination of two or more parts in a module is called a subassembly. There are primary, secondary, and higher order subassemblies. The highest order subassembly may be separated only into parts. The base element, whether a part or module, is that element from which assembly is begun. The amount of labor required for a machine shop in Toronto is 25 to 35 percent of the total labor required to produce an item.
The technological processes of assembly may be classified as individual, group, or standard. Individual processes are developed for the assembly of a single particular item. Group processes can be applied to the assembly of a number of items or modules that have common design characteristics. Standard processes are designed for various categories of connections and modules based on advanced assembly methods on an industry-wide scale.