can you please draw me a use case diagram for construction.
it includes: Employee
Department
Project
Works_on

Ha! Ha! Ha! Ha!

Read the terms and agreements of the site again. Which, by the way, you agreed to when you created your account here.

how to draw use case diagram. i will send you the crieteria.

how to draw use case diagram. i will send you the crieteria.

I think you've misunderstand him: no one will do it for you.

What you could do is post the criteria down in this thread, together with your own try, then we can check whether you did it correctly, and we can give you additional advices (if needed).