Sloth - The interactive workout planner

We present the mixed-initiative planning system Sloth, which is designed to assist users in planning a fitness workout. Mixed-initiative planning systems are especially useful for companion systems, as they allow the seamless integration of the complex cognitive ability of planning into ambient assistance systems. This is achieved by integrating the user directly into the process of plan generation and thereby allowing him to specify these objectives and to be assisted in generating a plan that not only achieves his objectives, but at the same time also fits his preferences. We present the capabilities that are integrated into Sloth and discuss the design choices and considerata that have to be taken into account when constructing a mixed-initiative planning system.