Design Project / E /
Commercial Product
Embedded Files
Ei | Development for Commercial Production
Ei | Development for Commercial Production
Recommended format
0 words / 5 pages
Level Descriptors of Student Achievement
1-3 The student demonstrates limited development of the design for a commercially viable production process.
4-6 The student demonstrates some refinement of the design, addressing some of the required modifications for a commercially viable production process
7-9 The student develops the design, addressing the required modifications for a commercially viable production process
In this section, you should consider how the design will be modified for commercial production. Potential modifications could be:
Reducing the number of components
Standardizing components for use in a product family
Using standard “bought-in” components
Reducing the number of processes
Considering the use of moulds, jigs and computer-aided manufacturing (CAM)
Redesigning components to make them suitable for being made using moulding processes (for example, considering drawing angles, sprues, and flash lines)
Using automated or low-skilled processes
Speeding up assembly time during production
Making assembly for the user intuitive (if necessary)
Considering the recycling of parts at the disposal stage for the user
Wastage consideration for materials (especially if using Computer Numerical Control (CNC)—use nesting to reduce waste and calculate the percentage).
This strand requires you to present annotated drawings or models of your product that present modifications for a commercially viable production process. The annotations should highlight additional research and/or feedback that enabled the development of this iteration.
Present your work for this strand in the following format:
1 page of your original design with annotations that identify areas and features that will be changed for commercial production. Remember, the changes here should not be related to changing the function or performance- those changes should be highlighted in strand Diii. Instead, changes in Ei should be focused on changing the design for manufacture.
4 pages of developmental drawings that show and explore how these changes might be made. A mixture of drawings and CAD drawings is ideal at this stage.
Resources
Resources
Note
Note
Work on section Ei and Criterion F at the same time, as design modifications (Ei) and material choices (Fi) will be closely related to the choice of certain manufacturing processes (Fii).
Eii | Commercial Product
Eii | Commercial Product
Recommended format
0 words / 1 page
Level Descriptors of Student Achievement
1-3 The student presents the developed commercial product with few details.
4-6 The student presents the developed commercial product with most details.
7-9 The student presents the developed commercial product comprehensively.
Examples of high performance (7–9 markband): The student presents the developed commercial product comprehensively.
This strand only requires you to present an annotated presentation of the commercial product. The annotation should highlight the key modifications required for commercial production.
If appropriate for your product it is recommended to create a CAD model of your design at this stage.
Include annotations that highlight the key features and changes that have been made in order to modify the design for commercial production.
Eiii | Design Proposal Commercial Product
Eiii | Design Proposal Commercial Product
Recommended format
350 words / 9 pages
Level Descriptors of Student Achievement
1-3 The student develops a design proposal for commercial production that includes few details and is not sufficient for a third party to manufacture the product.
4-6 The student develop a design proposal for commercial production that includes most details necessary for a third party to manufacture the product.
7-9 The student develop an accurate design proposal of the commercial product in sufficient detail for a third party to manufacture the product.
Technical drawings
You will need to create technical drawings for any parts that have been changed. For parts that have not changed from the prototype, you can refer to this, rather than produce a new drawing/replicate the drawing. The technical drawings could be.
Product: Dimensioned orthographic drawings that include details of all features
Textiles/fashion: A dimensioned pattern including hemlines, seam allowances, fold points, placements of holes, fastening placement
Electronics: A circuit diagram and printed circuit board (PCB) layout identifying the components that will be included in the circuit and how they are connected. If a Programmable Intelligent Computer (PIC) is used, a flow diagram/programming should be included
Mechanics: A schematic of how the components interact
Ideally, individual parts will be detailed in the technical drawings, with details of how the parts are assembled included in an assembly drawing. It is very difficult to provide sufficient detail of a prototype in dimensioned assembly or sub-assembly drawings without individual part drawings.
When detailing features on a part, students should consistently give dimensions from a single edge/point. The position of the feature should be clearly marked: holes/circular features should be marked from their centre; square/rectangular/linear features should be marked from a single edge. Other features may include clearances and chamfered/rounded/bevelled edges. You may need to include cutaway or section drawings to show the internal details of parts.
Assembly drawings
Present an assembly drawing that includes all individual parts, standard components and annotations where additional materials, such as an adhesive or finish, are used. You may use one, or a combination, of the following.
General assembly drawing
Outline assembly drawing
Diagrammatic assembly drawing
Unit assembly or sub-assembly drawing
Fitted assembly drawing
Exploded assembly drawing
Bill of materials
A bill of materials lists all of the components needed to assemble the prototype and includes the material, the major dimensions, the number of components required and an identifier/part number. For example:
For some processes, for example, injection-moulding, you can include the amount of material measured by weight, for example, “ABS: 26 grams”, in order to provide cost indications. Do not include more than 10 words in each cell of the bill of materials.
To meet the requirements of this strand, you need to detail the design in sufficient detail for someone unfamiliar with the product to be able to manufacture the product. These details should be presented as three separate elements:
A series of technical drawings
Assembly drawing(s)
A bill of materials
Example of an assembly drawing
The assembly drawing shows all of the parts and it is clear how they align to be put together. Annotation provides further detail of how the parts are fixed together. The bill of materials is complete, including the overall (maximum) dimensions of each part.
Example of a technical drawing
Both horizontal and vertical dimensions are sourced from a single origin point. There is sufficient detail to indicate the size and position of each feature. The centre and size of the holes for the other half of the mould to slot into are positioned clearly, and details such as the desired thread are marked. The additional drawings provide insight into the three-dimensional detail of the mould. Few, if any, assumptions need to be made to make the part.
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