A ‘Diary of Manufacture’ means demonstrating the justification for the selection of appropriate materials and components (using your CAD parts) and proposed techniques and processes to make those parts i.e. The neck of the main product should be manufactured from an extruded Aluminium tube because the part needs to be strong yet light in weight and should be resistant to moisture and not rust. As the part will move a surface painted finish would not be appropriate however I could consider using anodised aluminium to add an aesthetic effect. the best way to control product quality. 

The work that you have already done on modelling, prototyping and testing (Further Development / Concept Modelling) should help. 

Other planning decisions may involve:

• Reflecting on how easy the product was to manufacture in the time available, if it is necessary to simplify anything or if any special materials or tools are required

• How were the components manufactured – CADCAM, Hand tools / workshop 

• Estimating costs of materials, production costs and a possible selling price

Your record / diary should provide clear and detailed instructions for making your product. You should identify:

• The order of assembly of the different components

• Tools and equipment to be used

• Assembly processes

• The time each stage of manufacture / process took

• Key stages of manufacture where quality is checked (QA/QC) - FEEDBACK

• Safety requirements and/or procedures