Lecture Human computer interaction - Lecture 11: Design rules. Having approached interaction from both the human and the computer side, we then turn our attention to the dialog between them in this chapter, where we look at models of interaction. | Lecture 11 Design Rules Prof. Dr. Sajjad Mohsin design rules Designing for maximum usability – the goal of interaction design Principles of usability general understanding Standards and guidelines direction for design Design patterns capture and reuse design knowledge Design Rules We require design rules, which are rules a designer can follow in order to increase the usability of the eventual software product. Design Rules We can classify these rules along two dimensions, based on the rule’s authority and generality. By authority, we mean an indication of whether or not the rule must be followed in design or whether it is only suggested Design Rules By generality, we mean whether the rule can be applied to many design situations or whether it is focused on a more limited application situation. Design Rules Rules also vary in their level of abstraction, with some abstracting away from the detail of the design solution and others being quite specific. It is also important to determine the origins of a design rule. Types of design rules principles abstract design rules low authority high generality standards specific design rules high authority limited application guidelines lower authority more general application increasing authority increasing generality Design Rules The design rules are used to apply the theory in practice. The theory underlying the separate design rules can help the designer understand the trade-off for the design that would result in following or ignoring some of the rules. Principles, Standards and Guidelines There exists distinction between principles, standards and guidelines. Principles are derived from knowledge of the psychological, computational and sociological aspects of the problem domains and are largely independent of the technology. They depend to a much greater extent on a deeper understanding of the human element in the interaction. Principles, Standards and Guidelines Guidelines are less abstract and often | Lecture 11 Design Rules Prof. Dr. Sajjad Mohsin design rules Designing for maximum usability – the goal of interaction design Principles of usability general understanding Standards and guidelines direction for design Design patterns capture and reuse design knowledge Design Rules We require design rules, which are rules a designer can follow in order to increase the usability of the eventual software product. Design Rules We can classify these rules along two dimensions, based on the rule’s authority and generality. By authority, we mean an indication of whether or not the rule must be followed in design or whether it is only suggested Design Rules By generality, we mean whether the rule can be applied to many design situations or whether it is focused on a more limited application situation. Design Rules Rules also vary in their level of abstraction, with some abstracting away from the detail of the design solution and others being quite specific. It is also important to
