| Contract quotation process |  |
| Contract quotation process:
    Start                            Status
       |
       |       +-----+-----+
       |       | Create    |          Free
       +--->---+ service-  |
       |       | contract  |
       |       | quotation |
       |       +-----+-----+
       |             |
       |       +-----+-----+
       |       | Send to   |          Printed
       |       | customer  |
       |       +-----+-----+
       |             |
       |       +-----+-----+
       |     Y | Amend     |
       +       | service-  |          back to Free
       +---<---+ contract  |
               | quotation |
               |           |
               +-----+-----+
                     | N
                     |
                     |
               +-----+-----+
               | Service   |
       N       | contract- |
       +---<---+ quotation |
       |       | accepted  |          Canceled
       |       | by cust.  |
       |       +-----+-----+
       |             | Y              Accepted (for Contract)
       |       +-----+-------+
       |       | Process     |
       |       | service-    |
       |       | contract    |
       |       | quotation   |        Processed
       |       | to contract |
       |       +-----+-------+
       |             |
       |       +-----+-----+
       |       | Post and  |
       +--->---+ delete    |
               | service-  |
               | contract  |
               | quotation |
               +-----+-----+
                     |
       End       <---|