Page 293 - ExtendSim User Guide
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Resources and Shifts 267
Resource requirements
Example
The quantity expression named Pool2_IdleResources is shown in the screen shot below. It was created using a quantity of 3 and two of the filtering conditions (FC#1 and FC#2) that were shown in “Examples of filtering conditions” on page 264.
The quantity expres-
sion states that 3
resources will be
required and that each resource must come
from Pool 2 (FC#1 is
True) and have a total
idle time > 10 (FC#2 is True).
Using group filtering conditions
When creating a quantity expression, group filtering conditions must be used in conjunction with a resource filtering condition that specifies a particular group. This is accomplished by choosing Group as the property for the resource filtering condition.
For example, assume the members of Group A and Group B all have Skill Level = 2. If the quantity expression includes a condition that filters on the group property (Skill Level = 2), it must also include a second condition that filters on a resource property that is the Group (either Group = Group A or Group = Group B).
☞ When creating a quantity expression, group filtering conditions must be used in conjunction with a resource filtering condition that specifies a particular group. And the resource filtering condition must be specified before the group filtering condition can be added to the expression.
Testing
The application of a quantity expression selects a specified quantity of specified resources. It is then used to create the resource requirement. To determine if the expression selects the resource that is wanted, use the Test button.
Saving
A new or modified quantity expression won’t be available for use until the Save or Save As button has been clicked. Until the quantity expression is saved, its name will be displayed in red.
☞ Saving the quantity expression saves it to a database. To save the database, save the model.
Deleting a quantity expression
If you try to delete a quantity expression, it will probably give an error message that the quan- tity expression is being used by a resource requirement. Before the quantity expression can be deleted, any resource requirements that use it must also be deleted.
Default quantity expressions
One quantity expression with a default quantity of 1 is automatically created for each pool cre- ated using a Resource Pool block; default quantity expressions are optional if pools or groups are created using the Resource Manager block. A corresponding resource requirement is optionally created when a new quantity expression is created. See “Default resource require- ments” on page 268.
Discrete Event


































































































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