ExtendSim Models by John Michl

ExtendSim Models

Model Building Steps

Determine goals

Understand process to be modeled

Draw a block diagram of process

Specifiy parameter values

Define logic of model and connections

Validate the model

Add data collection and graphical analysis

Analyze output and draw conclusions

Block types

model activities

model resources

model routing

collect data

calculate stats

display output

Models share certain concepts

Selection of time units

Length of a run

Number of runs

Model verification

Model validation

Items

Import block

Input Data block

Program block

Attributes

Prioritizing items

Repository block

Export block

Operations block

Transaction block

Queuing

blocks

reneging option

balking

blocking

priority queues

Routing

Decision block

Decision(5) block

Select DE (discrete event) block

Merge block

Processing Time

Batching

Operation block

Batch block

Unbatch block

Resources

Labor Pool block

Cycle Time Analysis

Timer block

Measures

wait time

utilization

Count Items block

various statistics blocks

Plotters

Special Blocks

Executive

Input Random Number block

Activity blocks

Transaction block

Activity Multiple block

used to model transportation activities like mailing, emailing, faxing docs