AGENDA
Entity related 
Resource and queue related

BRANCH BLOCK
Used to control flow of entities through the model
Primary entity
Secondary entities may be cloned
More than one branch may be taken
Types
Probabilistic…
Conditional…
Deterministic…

PROBABILISTIC BRANCH
Random selection based on specified probability
Mutually exclusive, all total to 1.0
With, probability
Example
.8 

CONDITIONAL BRANCH
Selection is based on logical conditions of attributes or variables
IF, logical condition
Examples
Custtype==1
parttype==2

DETERMINISTIC BRANCH
Always
Must be taken by an entity
Causes error if maximum branches are already taken
Else
Causes branch to be selected unless the maximum number of branches has already been selected


SELECT
Parallel resources supplied by a single queue
Feed entities from a common queue block to one or more seize blocks
Selection rules
cyc, ran, por, lnb, snb, lrc, src


PICKQ
Downstream queues
Entity arrives at multiple parallel queues and resources
Entity decides which queue and resource to choose
Can only pick a queue that has remaining capacity
Resource selection rules
cyc, ran, por, lnq, snq, lrc, src


QPICK
Upstream queues
Entities are in parallel queues and are serviced by a single resource
Qpick takes the place of the queue block in the queue-seize-delay-release sequence
Detach modifier so the upstream queues do not have to be connected to a downstream block


DUPLICATE
Used to generate additional entities from original entities
All duplicates inherit attribute values
If to be later rejoined, must have identification attribute
Entities may proceed independently through the model
Application
Customer
Order

MATCH
Used to rejoin entities into one
Primary entity proceeds through the model
Duplicates are normally disposed of
Uses detached queues