Use case: perform duty engineer's checks

Purpose: confirm that the system is ready for observing

Actors: duty engineer.

Outline: DE checks the disk space in the disk server, the starting of the system and the cameras to be used that night.

Related use cases:

Typical course of events:

Action System response

1. The DE runs the use cases start DAS, start TCS and start CIA and ICS to get access to the system and check that the system starts correctly. System locates and connects to cameras, starts DAS status displays, starts the automatic image display and starts the display of the night report.

2. DE checks the disk space available on the disk server. If there is too little, the DE

deletes observations that the tape copier has marked as copied to both D and C tapes OR
calls appropriate personnel to identify observations to be deleted OR
readies spare disks on the DAS computer: chooses a disk to use, orders the DAS to use it and checks that the Data manager will scan that disk.

3. DE runs the use case test camera for each camera needed that night. System supplies observations as requested, and displays them so that the DE can inspect the quality of the data.

	Action	System response
1.	The DE runs the use cases start DAS, start TCS and start CIA and ICS to get access to the system and check that the system starts correctly.	System locates and connects to cameras, starts DAS status displays, starts the automatic image display and starts the display of the night report.
2.	DE checks the disk space available on the disk server. If there is too little, the DE deletes observations that the tape copier has marked as copied to both D and C tapes OR calls appropriate personnel to identify observations to be deleted OR readies spare disks on the DAS computer: chooses a disk to use, orders the DAS to use it and checks that the Data manager will scan that disk.
3.	DE runs the use case test camera for each camera needed that night.	System supplies observations as requested, and displays them so that the DE can inspect the quality of the data.