Nessun titolo diapositiva

1
Seminario su Swarm 2001-2002 Pietro
Terna pietro.terna_at_unito.it web.econ.unito.it/tern
a
2
Secondo semestre mercoledì 27.3 mercoledì
10.4 mercoledì 24.4 martedì 7.5
sempre dalle 17.15 alle 19, aula 12
3
nostro sito a http//eco83.econ.unito.it/swarm/
iscriversi alla mailing list seminarioswarm (vedi
sopra per le istruzioni) inoltre è utile
http//eco83.econ.unito.it/swarm/materiale/ quest
o file ppt e i successivi sono/saranno in linea a
http//web.econ.unito.it/terna/swarm/ e
a http//eco83.econ.unito.it/swarm/materiale/pptDe
lSeminario01-02/ questo è seminarioSwarm01-02-2002
0327.ppt
4
jVE Java Virtual Enterprise
Presentazione per SwarmFest 2002
a web.econ.unito.it/terna/jve/jVE SwarmFest
2002.zip
5
dictionary
A dictionary
unit a productive structure within or outside
our enterprise a unit is able to perform one
or more of the steps required to accomplish an
order order the object representing a good
to be produced an order contains technical
information (the recipe describing the
production steps) and accounting
data recipe a sequence of steps to be executed
to produce a good
6
recipes and units
Recipes and units
A system of enterprises and micro productive
units (a swarm)
market
Enterprise front end
1-2 2-13 28-7-27-7 ...
units
recipes
FE
7
our jVE enterprise (a sub-swarm of units)
FE
28
27
7
WD
WD
WD What to Do
8
basic recipe
Basic recipe
WD
The basic recipe in an order is
time quantity measured in days, hours, seconds
step in recipe
n1 ts m1 n2 ts m2 n3 ts m3 n4 ts m4 . . .
time specification days, hours, seconds
9
batch production
Batch production
WD
a unit is making a batch production if in a given
time interval it repeats b times the production
of the same step of the recipes of b orders
time quantity measured in days, hours, seconds
step in recipe
n1 ts m1 n2 ts m2 n3 ts m3 / b3
time specification days, hours, seconds
the slash is followed by the number of production
steps to be repeated in the given time interval
in a batch production of b pieces, the time
necessary for the production of each piece is
measured by the fraction m/b
10
procurement and component parts
Procurements or component parts produced by
ourselves
WD
Procurements we order outside the components
coded cx (here c1, c2, c3) our management has to
deal with the time necessary to have the order
performed, to make the transport, etc. (in the
third line, n2 can be a transport step)
e stays for end
n1 ts m1 e c1
n1 ts m1 / b1 e c2
n1 ts m1 / b1 n2 ts m2 / b2 e c3
We can explore the details of these recipes
considering other jVEsswarms and so using swarm
of swarms
n1 ts m1 n2 ts m2 n3 ts m3 e c4
Component parts produced internally we produce
inside the components coded cx (here c4, c5, c6)
our management has to deal with the time
necessary to have these internal order performed
n1 ts m1 e c5
n1 ts m1 / b1 e c6
11
steps using component parts
Using component parts (mainly, in assembly steps)
WD
p stays for procurement
step in recipe
n1 ts m1 p k c1 c2 . . . ck n2 ts m2 . . .
after step n1 we have here a procurement phase
(internal or external), looking for k components
coded c1, c2, . . ., ck
the unit performing the successive step asks to a
special object procurementAssembler to check if
the internal or external units can send the
components if not, the unit waits
the ability of a unit to call a special object to
have special tasks performed, increases widely
the degrees of freedom of the jVE structure
12
multiple paths
Multiple paths in recipes
WD
after each step we can have multiple paths in our
recipes, but only one of them is followed at a
specific time
n1 ts m1 n2 ts m2 n3 ts m3 n4 ts m4
or
n22 ts m22
end
we use here a C-like formalism ( or)
n1 ts m1 1 n2 ts m2 n3 ts m3 2 n22
ts m22 0 n4 ts m4
where 0 stays for the conclusion of the
multiple paths
13
parallel paths
Parallel paths in recipes
WD
after each step we can have also parallel paths
in our recipes, all to be simultaneously executed
at a specific time
n1 ts m1 n2 ts m2 n3 ts m3 n4 ts m4
and
n22 ts m22
end
we use here a C-like formalism ( and)
n1 ts m1 1 n2 ts m2 n3 ts m3 2 n22
ts m22 0 n4 ts m4
where 0 stays for the conclusion of the
multiple paths
14
an intricate example (i)
An intricate example (i)
WD
p 4 c1 c2 c3 c4 n1 ts m1 n2 ts m2 n3 ts
m3 n4 ts m4
or
p 2 c1 c2 n5 ts m5 n6 ts m6
and
p 2 c3 c4 n7 ts m7
gives
1 p 4 c1 c2 c3 c4 n1 ts m1 2 1 p 2
c1 c2 n5 ts m5 2 p 2 c3 c4 n7 ts m7
0 n6 ts m6 0 n2 ts m2 n3 ts m3 n4 ts m4
15
an intricate example (ii)
An intricate example (ii)
WD
We can represent the same example as a supply
chain so the second path of the or choice
becomes
p 2 c1 c2 n5 ts m5 e c1001
p 2 c3 c4 n7 ts m7 e c1002
and, summarizing,
p 4 c1 c2 c3 c4 n1 ts m1 n2 ts m2 n3 ts
m3 n4 ts m4
or
p 2 c1001 c1002 n6 ts m6
16
a closer look to inventories
WD
A closer look to inventories
17
warehouses
Warehouses and inventories stand alone
productions
28-7-27-7
WD
units
?
FE
7
FE
28
7
27
?
?
?
? how to decide?
18
procurement
Procurement
28-7-27-7
WD
units
FE
7
121
34
28
...
73
Exploding recipes to consider deeply
subprocurement problems
28-121-34--73-7-27-7
19
inventories in supply chains
Inventories in supply chains
n1 n2 . . . n10 e 121 n11 n12 . . .
n15 e 341 n21 n22 . . . n25 e 342 p
2 341 342 31 e 34
WD
virtual or actual units keeping the completed
procurement components in a list (in a warehouse)
20
DW
DW
DW which is Doing What
21
simple units
Simple unit data are reported in a text file
DW
unit___useWarehouse____prod.phase_____fixed_cost
s_____variable_costs 1 1 11 12 1 2 1 0
0 0 3 1 3 15 2 4 1 0 0 0
5 1 51 12 2 6 1 6 11 20 7 1 12 23
1 8 1 8 22 11 9 1 13 7 12 10 1 18 40
7 11 1 11 5 1
22
complex units 1
DW
Complex units are able to perform more than one
(unique) production step We read their data from
a sheet in a spreadsheet (Excel like, produced
via Office or StarOffice or OpenOffice or . . .
To access spreadsheet data from a Java
environment we use the ExcelReader.java class,
written by Michele Sonnessa (sonnessa_at_di.unito.it)
and based upon the Andy Khan's excelread library
(http//www.andykhan.com/excelread/)
23
complex units 2
The general scheme (to be used as a remark page)
DW
24
complex units 3
A specific complex unit
DW
25
Scaricare jVE da http//web.econ.unito.it/terna/jv
e/ usando jVEfileProvvisoriPerSeminario.zip oppure
la versione 0.60 non appena disponibile
Iniziamo a studiare il modello da VEFrameModelSwar
m.java UnitParameters.java Unit.java