Four collections of Design Principles: “It is right that we should stand by and act on our principles; but not right to hold them in obstinate blindness, or retain them when proved to be erroneous.”
The 15 Things Charles and Ray Eames Teach Us*
1. Keep good company
2. Notice the ordinary
3. Preserve the ephemeral
4. Design not for the elite but for the masses
5. Explain it to a child
6. Get lost in the content
7. Get to the heart of the matter
8. Never tolerate “O.K. anything.”
9. Remember your responsibility as a storyteller
10. Zoom out
12. Prototype it
14. Make design your life… and life, your design.
15. Leave something behind.
(* From: An essay by Keith Yamashita)
The Hannover Design Principles by William McDonough and Michael Braungart
Insist on rights of humanity and nature to co-exist in a healthy, supportive, diverse and sustainable condition.
Recognize interdependence. The elements of human design interact with and depend upon the natural world, with broad and diverse implications at every scale. Expand design considerations to recognizing even distant effects.
Respect relationships between spirit and matter. Consider all aspects of human settlement including community, dwelling, industry and trade in terms of existing and evolving connections between spiritual and material consciousness.
Accept responsibility for the consequences of design decisions upon human well-being, the viability of natural systems and their right to co-exist.
Create safe objects of long-term value. Do not burden future generations with requirements for maintenance or vigilant administration of potential danger due to the careless creation of products, processes or standards.
Eliminate the concept of waste. Evaluate and optimize the full life-cycle of products and processes, to approach the state of natural systems, in which there is no waste.
Rely on natural energy flows. Human designs should, like the living world, derive their creative forces from perpetual solar income. Incorporate this energy efficiently and safely for responsible use.
Understand the limitations of design. No human creation lasts forever and design does not solve all problems. Those who create and plan should practice humility in the face of nature. Treat nature as a model and mentor, not as an inconvenience to be evaded or controlled.
Seek constant improvement by the sharing of knowledge. Encourage direct and open communication between colleagues, patrons, manufacturers and users to link long term sustainable considerations with ethical responsibility, and re-establish the integral relationship between natural processes and human activity.
The Principles of Design by Dieter Rams
Good Design Is Innovative : The possibilities for innovation are not, by any means, exhausted. Technological development is always offering new opportunities for innovative design. But innovative design always develops in tandem with innovative technology, and can never be an end in itself.
Good Design Makes a Product Useful : A product is bought to be used. It has to satisfy certain criteria, not only functional but also psychological and aesthetic. Good design emphasizes the usefulness of a product while disregarding anything that could possibly detract from it.
Good Design Is Aesthetic : The aesthetic quality of a product is integral to its usefulness because products are used every day and have an effect on people and their well-being. Only well-executed objects can be beautiful.
Good Design Makes A Product Understandable : It clarifies the product’s structure. Better still, it can make the product clearly express its function by making use of the user’s intuition. At best, it is self-explanatory.
Good Design Is Unobtrusive : Products fulfilling a purpose are like tools. They are neither decorative objects nor works of art. Their design should therefore be both neutral and restrained, to leave room for the user’s self-expression.
Good Design Is Honest : It does not make a product more innovative, powerful or valuable than it really is. It does not attempt to manipulate the consumer with promises that cannot be kept
Good Design Is Long-lasting : It avoids being fashionable and therefore never appears antiquated. Unlike fashionable design, it lasts many years – even in today’s throwaway society.
Good Design Is Thorough Down to the Last Detail : Nothing must be arbitrary or left to chance. Care and accuracy in the design process show respect towards the consumer.
Good Design Is Environmentally Friendly : Design makes an important contribution to the preservation of the environment. It conserves resources and minimises physical and visual pollution throughout the lifecycle of the product.
Good Design Is as Little Design as Possible : Less, but better – because it concentrates on the essential aspects, and the products are not burdened with non-essentials. Back to purity, back to simplicity.
The Principles of Design by Don Norman*
Visibility – The more visible functions are, the more likely users will be able to know what to do next. Incontrast, when functions are “out of sight,” it makes them more difficult to find and know how to use.
Feedback – Feedback is about sending back information about what action has been done and what has been accomplished, allowing the person to continue with the activity. Various kinds of feedback are available for interaction design-audio, tactile, verbal, and combinations of these.
Constraints – The design concept of constraining refers to determining ways of restricting the kind of user interaction that can take place at a given moment. There are various ways this can be achieved.
Mapping – This refers to the relationship between controls and their effects in the world. Nearly all artifacts need some kind of mapping between controls and effects, whether it is a flashlight, car, power plant, or cockpit. An example of a good mapping between control and effect is the up and down arrows used to represent the up and down movement of the cursor, respectively, on a computer keyboard.
Consistency – This refers to designing interfaces to have similar operations and use similar elements for achieving similar tasks. In particular, a consistent interface is one that follows rules, such as using the same operation to select all objects. For example, a consistent operation is using the same input action to highlight any graphical object at the interface, such as always clicking the left mouse button. Inconsistent interfaces, on the other hand, allow exceptions to a rule.
Affordance – is a term used to refer to an attribute of an object that allows people to know how to use it. For example, a mouse button invites pushing (in so doing acting clicking) by the way it is physically constrained in its plastic shell. At a very simple level, to afford means “to give a clue”. When the affordances of a physical object are perceptually obvious it is easy to know how to interact with it.
(* Preece, J., Rogers, Y., Sharp, H. (2002), Interaction Design: Beyond Human-Computer Interaction, New York: Wiley)