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CHAPTER 4. JSIM WIZ
Fastest Service: with this strategy, a job is routed to the device with the smallest average service time, S,
for the job’s class. In the figure, the exiting job will be routed to the top station since it service time is
the minimum among the three.
Service section
How to Define the Service Strategy This section is present in server and delay stations. This section
allows the specification of the number of servers, for server stations, and the service time distribution, for both
server and delay stations.
Delay stations are infinite servers with identical service time, therefore they only need the service time
distribution. The infinite number of servers provides for equal average response time for all jobs, as no job
waits in queue for service.
In this section, the load dependent or independent nature of the service time is also specified for each class
in server stations:
The number of servers in a server station can be modified using the corresponding input area:
For each class, you must specify whether the service time is Load Dependent or Load Independent using this
menu:
A load independent service indicates that, regardless of the number of jobs that are in the station, the system
will serve all jobs following a fixed policy modelled by the chosen statistical distribution.
For each class, the Service Time Distribution is set to Exponential with average equal to 1. It can be modified
button and inserting all the required parameters from this window:
by clicking the