We want to automate our experiments to run continuously. It would be pointless to run an experiment only once because we could never be sure when the right moment is: When is the system in conditions under which it would produce some negative effect? Therefore, we should run the experiments continuously. That can mean every hour, every few hours, every day, every week, or every time some event is happening in our cluster. Maybe we want to run experiments every time we deploy a new release or every time we upgrade the cluster. In other words, experiments are either scheduled to run periodically, or they are executed as part of continuous delivery pipelines.