Design Stratergies

• Iterative design- cyclic approach
• Each iteration of a design is tested and evaluated. changes and refinements are then made.
• E.g Dyson vacuum cleaners- the orginal DC01 was developed as a result of thoudands of different prototypes.

Advantages of iterative design:

• Due to each iteration being tested/evaluated problems are more likely to occur in early stages instead of the final design.
• Encourages a focus on the most criticle aspects of a products design.
• User feedback is constantly being gathered.

Disadvanrtages of iterative design:

• Designers can be too focussed on one iteration they loose sight of the rest of the design,
• It can be very time consuming.

• An approach where the needs and wants of the end user are considered extensively at each stage of the design process.

Advantages of user-centred design

• The end user feels a greater scense of ownership as it is more tailored to suit there needs.
• By listening to the end user at each design stage means the final product will meet the users' needs/expectations.

Disadvanteges of user-centred Design

• Requires extra time to meet and interview users and takes designer time to alter the design based on user feedback.
• Product may not be suitible to sell to a wider audience because it becomes to focused on one user's idea/ preference.

• The systems based approach is often used when designing electronic or mechanical components to design the overview of the system,
• Top-down approach- starts with an overview of the overall system in terms of its input process and output sub-systems. Detaols form individual components of each sub-system are considered later.

Advantages of a systems Approach

• It does not require highly specialist knowledge of electronic or mechanicae components to design the overview of the the system.
• the top down approach makes it easy to communicate how the system will work to non-technical specialists, such as clients.
• The system is designed in blocks, so it is easier to find errors or faults in the design.

Disadvantages of a sysrems Approach

Because of the block based design approach, it can lead to the use of componets that are not necessary.

Can lead to larger costs due to unnecessary componets.