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6
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Resources and Shifts
Primary transactions for ARM
#
Description
If items can be serviced, the Resource manager notifies Queues with waiting items that the required resources are available.
The Queues check for being blocked. If they are not blocked, they grant permission to the Resource Manager to allocate the idle resources to the items.
The Resource Manager allocates the resources and changes their status to busy.
Shift
Message- Sending Block
Resource Manager
Queue
Message- Receiving Block
Queue
Resource Manager
Database Tables Used
RO, Resources, RTL
RO, Resources, RTL
Queue
When advanced resources use a Shift block, the transactions are as follows.
The Queues release the items.
INTERNAL DATABASE
3,7 4 RESOURCE MANAGER
5
8
1
SHIFT
2
6
QUEUE
Discrete Event


































































































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