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Design and Applied Technology (Secondary 4-6)

1.3 PRODUCT EVALUATION

The process that determines the quality of a product is called ‘product evaluation’. Such a

process is of great importance throughout the product development cycle. Whether it is a

comparison among existing products in the research stage, or a selection among potential

concepts in the development stage, a proper evaluation is required for the decision making.

The essential first step of the product evaluation process is the establishment of product

evaluation criteria which will be explained in Section 1.3.4.

The cost of making changes increases as the product development cycle approaches its end.

For this reason, such changes should be done as early as possible, so that impact on the

project schedule, financial status of the project, etc can be minimized.

Regardless of size, products need evaluation

1.3.1 Presentation and Prototype

How a designer demonstrates her/ his proposals for product evaluation is very important,

especially when the people involved in the evaluation may not be familiar with the drawing

conventions that the designer uses. Ideally, product models should be shown as if they are

already the real objects of the products.

Unfortunately, there is no free lunch. The costs of making a model or prototype normally

increase as it is more close to a real product. The following are some trade-offs:

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