SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Programming Language
1 preamble
2 normally mode is integer
3
4 resources
5 every PRODUCTION.CENTER has a MACHINE.TYPE
6 define MACHINE.TYPE as a text variable
7
8 processes
9 every JOB has an ARRIVAL.TIME
10 and owns a ROUTING.SET
11 define ARRIVAL.TIME as a real variable
12
13 temporary entities
14 every task has
15 a TASK.DOER
16 a TASK.DURATION
17 and belongs to a ROUTING.SET
18 define TASK.DURATION as a real variable
19 define TASK.DOER as an integer variable
20
21 define ROUTING.SET as a fifo set
22
23 external events are JOBINIT and ANALYSIS
24 external event unit is 1
25
26 define CYCLE.TIME as a real variable
27
28 accumulate AVG.QUEUE.LENGTH as the average
29 of N.Q.PRODUCTION.CENTER
30
31 tally AVG.CYCLE.TIME as the average,
32 and NO.OF.JOBS.COMPLETED as the number of CYCLE.TIME
33
34 define LAST.REPORT.DATE as a real variable
35
36 end
The Preamble contains the destination of the objects involved in the simulation — its processes and
resources, its entities, attributes, and sets, and the required statistics.
Jobs passing through the shop are modelled by the JOB process.
The route each job follows through the shop is defined by an ordered list of TASK’s called the
ROUTING.SET. Each TASK is a temporary entity with attributes defining the required machine (DOER)
and processing time (DURATION).
Desired statistics are specified non-procedurally, with accumulate and tally statements.
240