Activity

Processes can be sub-divided into smaller and smaller units or sub-processes.  The term “activity” is a generic term that can be used to describe any sub-processes at any level.  Thus, we can say that a process is made up of one or more activities. Activities can consist of a single step, like approving a purchase request or placing a cap on a bottle on a production line. Other activities involve multiple steps, like filling out a form, or assembling a chair. There is no consistency regarding how various methodologies use terms like task and step, but they are all, more or less, synonyms for activity.