SIMSCRIPT II.5 Programming Language

Discrete Simulation Concepts
Job 2 activity
Job 1 activity
START.JOB 1
START.JOB 2
END.JOB 1
END.JOB 2
Simulated time
Figure 5-3b. Two Nested Activities
END.JOB 1
START.JOB 1
Simulated time
START.JOB 2
END.JOB 2
Figure 5-3c.Two Activities with a Common Event Time
Table 5.1. Figure 5-3 Event Order
Time Figure 5-3a. Figure 5-3b. Figure 5-3c.
START.JOB 1 START.JOB ⎛START.JOB 1 1 ⎞
⎜START.JOB 2 ⎟ in parallel
⎝
⎠
START.JOB 2 START.JOB 2
END.JOB 1 END.JOB 2 END.JOB 1
END.JOB 2 END.JOB 1 END.JOB 2
5.2.1 Event Declaration
A routine is declared to be an event routine rather than a callable subprogram by use of the word
event rather than routine in the routine definition. The flow of control within an event routine
behaves in the ordinary way, in that control is passed to the start of the event and leaves by a
return statement. Typical event routine declaration statements are:
event ARRIVAL given LOCATION and ALTITUDE
event DEPARTING(DESTINATION)
event ALLOCATION(SUM, PERSON1, PERSON2)
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