Preceding and succeeding activity relationships
A preceding and succeeding activity relationship ensures that the related activities have Scheduled Day and Scheduled Start Time property values that appropriately order the activities.
For example, you can specify that a practical activity must occur after the lectures that its subject matter is taught in. This ordering is described by one relationship: the lectures are preceding activities of the practical; the practical is a succeeding activity of the lecture.
The relationship is a scheduling constraint; the valid values for the Scheduled Day and Scheduled Start Time properties of an activity are determined by the values that other activities in the relationship have for those properties.
Sequencing constraints do not take the teaching week pattern of the activities into account. As long as preceding activities have an earlier Scheduled Day and Scheduled Start Time, they can occur during weeks that are later in the teaching year than their succeeding activities.