Entries gamma,5-30 and phi:8-10 are assigned to participant Desmond (login id: heng00). Desmond has finished translated entries gamma,5-10. The figures below explain the relationships among the assignment database, status-bitmap file, and completion database.

As we can see, the information in the completion database can be derived from the assignment database and the related status-bitmap file. However, having a separate database to keep these frequently accessed data helps to increase performance.