Information Technology Reference
In-Depth Information
SM 1:
Model world
SM 2:
World events
SM 3:
Entities
SM 1.1:
Time
SM 3.1:
Articles
SM 1.2:
Environment
SM 3.2:
Workers
SM 1.3:
Rules
SM 3.3:
Forklifts
SM 3.4:
Warehouse Manager
Figure A.1:
Decomposition of the model into submodels SM 1, SM 2,
and SM 3.
Table A.2:
Relation of simulation time to real time.
Simulation time
T
0123456. . .
Real time [s]
0 0.1 0.2 0.3 0.4 0.5 0.6 . ..
Macro-level: Environment
The floor-layout of the warehouse is modeled as a rectangular, grid-like
environment. A schematic of the environment is shown in Figure A.2.
Each cell of the grid has a size of 1m
×
1m and can be uniquely
identified by its (
x, y
)-coordinates, with the origin (0
,
0) being in the
upper-left corner:
L
=
{
(0
,
0)
,
(1
,
0)
,
...,
(
n
x
−
1
,
0)
,
(0
,
1)
,
(1
,
1)
,
...,
(
n
x
−
1
,
1)
,
(A.1)
. .
.
.
.
.
(0
,n
y
−
1)
,
(1
,n
y
−
1)
,...,
(
n
x
−
1
,n
y
−
1)
}
The cells are distinguished into two different types:
Storage area
The storage area allows storage of articles. It is asssumed that
articles are not stacked on top of each other. Furthermore, the
