As mentioned earlier, one of the key settings you will select for each activity is the activity type. There are six different ways that activities can behave:
Each of the following examples assume there are no constraints assigned to activities. It is a bad habit to rely on constraints as a substitute for schedule logic.
A milestone represents an activity which has no time associated with it, though it can have costs and a resource assigned as responsible for noting this activity as completed. Use these in the case where an activity needs to report when it starts, not its progress or finish date.
An example start milestone ...