There are two types of people in the universe. Those who understand mathematics and those who don’t. You can very well substitute the word ‘mathematics’ by patterns or design. Design is like music, it is inherent in everything.
So what is Design?
I can put in a simple equation, design = form + harmony + content + behavior
Design is a harmonizing form and content with desirable behavior.
There are two things about design, one is design for body and other is design for mind. For example, designing a chair is design for body. It is easy to design, because things are visible. But designing a software is not easier because we are designing for mind and it is not visible. That’s why software development is so complex. Even in designing for body we need to address the factors like comfortable, ease of use, etc.., which attributes to the mind also.
In fact we are all designers. Every day at least we design ourselves (dress neatly, choose good dress color, comb the hair, etc.,). Trying to have a smart look is the task of designing for other’s mind.
The design process involves four major activities: what matters?, How should we respond?, How should the product be designed?, and How are we doing?
This post will weave all the design thoughts in the earlier posts. In ‘How an object makes object?‘, we had seen that every system has a center and the complex system can be designed, usually in a layered approach with fixed center as the driving points. In ‘Singing the Rhythm‘, we had observed, there are patterns in every systems and following a ordered approach in design makes the design scalable. Hence, formulated the design sutra, “With static, form the rhythmic motion”. In ‘Rang de‘, we had discussed few aspects of color and role of visual perception. In ‘How the left, left the right?‘, we balanced the creative and logical aspect of the design and also the important properties of a product. In ‘The understanding‘, we had seen the importance of understanding the users and the way to achieve it through contextual inquiry. In ‘Central tendency‘, we came to know how to personify a group of users based on averageness and design for it with the help of scenarios.
It’s just the tip of the iceberg and if your interested more in design, the following books are recommended:
Donald Norman, The Design of Everyday Things, Basic Books, 
Alan Cooper, Robert Reimann, About Face 3.0, Wiley