If you do not enter any factor for the lesson group, the default value will be '1.000'. The time limitation factor will be calculated from the length of the time limitation and the number of school or teaching weeks in the same way as in chapter ' Value calculation with time limitations '.
Example:
Please open the Demo2.gpn file, deactivate teacher class and subject factors and enter the time period 19.09 - 23.12 for the lesson group Sport ('Lessons | Lesson Groups')
The time limitation factor for this lesson group is 0.341.

Now open 'Lessons | Teachers' and look at lesson 2 of teacher Aristotle.
The lesson is assigned to the lesson group Sport and the value is the product of weekly periods and time limitation factor for the lesson group:
(Value) = (Weekly periods) * (Time limitation factor for the lesson group)
1.024 = 3 * 0.341
