Rockwell Automation Arena Users Guide - Manual (Page 42)

A RENA U SER ’ S G UIDE
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Decide module
D ESCRIPTION
This module allows for decision-making processes in the system. It includes options to
make decisions based on one or more conditions (e.g., if entity type is Gold Card) or
based on one or more probabilities (e.g., 75%, true; 25%, false). Conditions can be based
on attribute values (e.g., Priority), variable values (e.g., Number Denied), the entity type,
or an expression (e.g., NQ(ProcessA.Queue)).
There are two exit points out of the Decide module when its specified type is either 2-way
by Chance or 2-way by Condition. There is one exit point for “true” entities and one for
“false” entities. When the N-way by Chance or by Condition type is specified, multiple
exit points are shown for each condition or probability and a single “else” exit. The
number of entities that exit from each type (true/false) is displayed for 2-way by Chance
or by Condition modules only.
T YPICAL USES
„
Dispatching a faulty part for rework
„
Branching accepted vs. rejected checks
„
Sending priority customers to a dedicated process
P ROMPTS
Prompt Description
Name Unique module identifier displayed on the module shape.
Type Indicates whether the decision is based on a condition (if X>Y) or by
chance/percentage (e.g., 60%, yes; 40%, no). The type can be specified
as either 2-way or N-way. 2-way allows for one condition or probability
(plus the “false” exit). N-way allows for any number of conditions or
probabilities to be specified as well as an “else” exit.
Conditions Defines one or more conditions used to direct entities to different
modules. Applies only when Type is N-way by Condition.
Percentages Defines one or more percentages used to direct entities to different
modules. Applies only when Type is N-way by Chance.
Percent True Value that will be checked to determine the percentage of entities sent
out a given True exit.
If Types of conditions that are available for evaluation: Variable, Variable
Array (1D), Variable Array (2D), Attribute, Entity Type, Expression.
Number of entities
that have taken the
True branch
Number of entities
that have taken the
False branch