Visual Logic
All of the models constructed so far were built via a GUI without any additional programming. Simul8 has a
scripting language, visual logic (VL) which allows more complex logic to be built into the model, which may
be necessary for more invo
Distributions (densities) in Simul8
So far we have set up distributions for work centres and work entry
points via the properties of these objects.
There is also additional functionality that allows more complex
structures to be used and these can be acc
Multiphase and multichannel queues
Problem
A sole barber has customers arriving in for service randomly in time and at an average rate of 5 per hour.
Haircuts take a time that is normally distributed with mean 9 minutes and standard deviation 2.4 minutes
Labels
In our examples so far, we have considered all work items to be similar. Sometimes we will need to assign
attributes or properties to work items. For example, our work items might be shoppers in a supermarket. We
might need to distinguish between
Resources
In the various examples we have previously considered we have used the Simul8 work center object to
represent a processing station or server of some kind. Often the server will be a single real world entity; either a
machine (e.g. an ATM or a f
Overview of simulation
There are many examples from all fields of human activity where it is of interest to acquire new knowledge
about the operation of some real world process or system, possibly before the system even exists. Here we
consider the inves
Back to our car wash example
What if the car wash must be switched off for 5 minutes every half hour?
We can implement this feature by using the Efficiency button in the work centres properties. There would be
little negative impact on throughput but a co
Mec/Man 4 / BCAM 4
WE (Work entry point)
Facility Simulation
Problem sheet Solutions
WC (Work centre)
SB (Storage bin)
Note that these icons are the default business icons used by Simul8. You may prefer to use the
manufacturing ones. File Preferences Disp
Mec/Man 4 / BCAM 4
Facility Simulation
Problem sheet
Q1
Simulation modelling may be considered one of three methods of acquiring new knowledge about
a system, the others being mathematical modelling and direct observation / experimentation. Give
two advan
Mathematical models
The car wash example above is sufficiently simple to allow it to be amenable to mathematical manipulation.
For a simple queue like this where the arrival rate follows an exponential distribution with mean inter-arrival
time of A and w