Structural Approach Diagrams?

Question

Business Informatics

The task is given in tabular form as the teacher put it:
"Information system" Furniture factory ""

It is necessary to model the business process using a structural approach, that is, to draw up diagrams:
1) Initial context diagram
2) Conceptual data model
3) Data flow diagram
4) Diagram system processes
5) A sequence diagram of screen forms
For example, like this
https://studbooks.net/2052370/informatika/postroen...
What's wrong with the task? It seems that they showed a half-finished house and said to make a project of this house at the same time completing the construction of the house.
Explain what is wrong with this task.