How is it manufactured and assembled, and what does it cost?

In either a narrative or step-by-step style, discuss the manufacturingand cost of the final design. Include areasonably detailed manufacturing and assembly plan (with pictures and/or figures) that details how the final design could be manufactured and that estimates the per-unit production cost (including labor, materials, overhead,...) at a production volume that makes sense for your project (probably from 1 – 10 units). Use the recommended cost estimation procedure discussed in class, or an equivalent method.

Complete Drawing Package, Parts List and Bill of Materials

A complete drawing package includes the assembly-level and part-level drawings thatsummarize and communicate your design. Please provide a set of drawings with sufficient detail to control manufacture and assembly of the final design (i.e. the drawing set could be sent to a manufacturing shop for the final design to be produced). Make sure to do a good job fully dimensioning and tolerancing the drawings. The assembly drawings should include all assembly-level dimensions and should show all parts (purchased and manufactured) with part numbers. Include in the parts list the best available purchase information (vendor/part #/part description) for purchased items. When using the assembly drawings along with the parts listsan engineer should be able to identify every part and find the info needed to purchase or make it.

Note that detailed drawings are not required for components/subassemblies that are purchased and not modified prior to assembly. These are specified in the parts list and should be shown with key dimensions to scale in the subassembly/assembly drawings. Modification drawings are required for purchased parts that require some manufacturing prior to assembly.

  • All tolerances, dimensions and features on the drawings must be readable. Make sure the method you use to include drawings in your report yields quality images that are readable.
  • There is no need to draw details of standard hardware like nuts, bolts, washers, castors, computers, etc.; just specify them in the Bill of Materials.
  • For projects with a large number of parts, it is acceptable to only include drawings of the most significant parts.

Note: The material, material condition, manufacturing method, surface finish, and tolerances should be specified for the most significant components and justified based on Design for Manufacturing and Assembly principles. Provide some explanation for the tolerances specified in the drawings, how the dimensions fully control the important part features, and how manufacturing considerations were included. (Every team member should be the primary author for at least one of these explanations.)

For important dimensional features, reference ASME Y14.5M Geometric Dimensioning and Tolerancing Standards

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