One of the main advantages of direct manipulation is that you get (almost) immediate How do we get from interaction ideas and information about the users and how the users would like the system to workto an elegant, interactive system? Methods are needed to structure and organise the work, so one of the key points is to involves users in all phases of design. It's argued that it is too slow and and difficult to involve users in the design cycle, so how can this be tackled?

11-2 What are artificial intelligence (Al) and machine learning? How do businesses use Al? Define artificial intelligence (AI) and the major Al techniques. Define an expert system, describe how it works, and explain its value to business. Define machine learning, explain how it works, and give some examples of the kinds of problems it can solve, Define neural networks and deep learning neural networks, describing how they work and how they benefit organizations. Define and describe genetic algorithms, and intelligent agents, Explain how each works and the kinds of problems for which each is suited.