We choose Waterfall model because it gives the benefits of feedbacks that are very effective. This software development life-cycle model enhanced with the integral processes given below in Drawing.



Sequence Diagram for dynamic website:

Scenario:

 We have an project file to be uploaded in the projects part.
 To do this process, firstly we need to log in with and admin username and password. Checking out login process from users table at the database.
 Having done that, then the control panel for admin will be displayed.
 By using control panel, admin will upload the file from his/her own PC to the projects part of the website.



Comunication Diagram

Our comunication diagram has the same scenario with the sequence diagram above. It does not shows the liftime of the messages, instead it shows the interaction between the processes.