Engaging patterns. Challenges and means shown at an example

The paper presents first results of a research projects that has the goal to develop a pattern language which enhances business software by motivating and engaging elements. The goal of the pattern language is to turn the soft and vague term of "emotions in user interaction design" into constructive design guidance. The patterns are especially tailored for joy-of-use in business applications. The main contribution of the paper is the description of quality characteristics for that pattern language. They are illustrated by referring to existing pattern descriptions and elaborating there deficiencies. We show how we addressed the weaknesses in our pattern language.