Shows the employees who does shift work. It also shows which shift table they are in and its rate.

Shows the formula on what leave / deduction / allowance etc, the employee has taken. This is the primary key for the Formula table.
Example: ANL (Annual leave) / Deduction of Sick leave / HOL (Paid Holiday)

Shows the identity of the shift table. This also acts as a primary key for the Shift table.
Example: Standard Shift Table