Finish the use case, planning game and working on the Test Case

Today i have finished the 11 use cases and the planning game(so called the User Story) in the documentation. Since I didn't think the system carefully, I have missed a very big topic when I found it at 22:00! We didn't consider the control of the external calculator and the buying/selling rate of the banking Transaction.

The most important thing we have missed is that: We didn't think (after the forst meeting) the design of the transaction-record update table!