Logical framework of the impact of the electric power supply

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Transcript Logical framework of the impact of the electric power supply

WP5 – D5.1
Logical framework of the impact of
the electric power supply on a
logistic-production system
Carlo Noè, Tommaso Rossi
Cattaneo University – LIUC
Italy
1
Logistic-production system
machines for working and assembling
facilities for transportation, handling and storing
quality control station
Supply chain
network of logistic-production systems with
material and information exchanges
2
The context: casual diagram
-
- Not detected
wastes
+
Quality control
effectiveness
+
Non quality of
electric power
supply
+ Defective
parts
+ Machine-tool
stoppages
+ Detected
wastes
Saturation of the
logistic-production
system
+
Service
level
-
+
+ Actual lead +
time
+
- On time
delivery
+ Parts to be
reworked
+
+ Production
costs
+
Prices
+
3
Effects of faults in electric power supply
on logistic-production system (EoP)
1. Machine-tool stoppages resulting in
defective parts or parts to be
reworked
2. Defective parts even if machine-tool
stoppages do not occur
3. Decrease of quality control
effectiveness
4
Impacts of EoP on operative
performances
1.
2.
3.
4.
Production costs
On-time delivery
Production goodness
Global service level
5
Non quality of electric power supply
Simulated by Monte Carlo simulation
model according to the probability
distribution of all events occurring in the
net
-
-
Quality control
effectiveness
Not
detected
wastes
+
+
+
Non quality of
electric power
supply
Defectiv
e parts
+
Machinetool
stoppages
+ Detecte
d wastes
Saturation of the
logisticproduction
system
+
Service
level
-
+
+ Actual lead +
time
+
+ Parts to be
reworked
+
+ Productio
n costs
+
+
On
time
delivery
Prices
6
Production system and electric power
faults
Modelled by an attributed Petri net
composed of two sub-nets.
The first one models the production
system and the second one the electric
power faults occurrence
-
-
Quality control
effectiveness
Not
detected
wastes
+
+
+
Non quality of
electric power
supply
Defectiv
e parts
+
Machinetool
stoppages
+ Detecte
d wastes
Saturation of the
logisticproduction
system
+
Service
level
-
+
+ Actual lead +
time
+
+ Parts to be
reworked
+
+ Productio
n costs
+
+
On
time
delivery
Prices
7
The Petri net
T4
P12
type=1
T19
P19
T6
P4
T1
P1
P2
T2
type=1
type=g(power
network)
T18
type=3
T5
P3
d=f(power network)
T3
type=2
P6
P16
P8
T15
d=h(power network)
T13
T7
goodness=1
P9
goodness=
min[v,disc(0,1)]
P18
P5
T17
type=2
P7
T8
goodness=0
T14
P20
P15
v=0
T9
perceived
goodness=1
P10
T10
perceived
goodness=0
perceived
goodness=
disc(0,1)
d=repair time
P17
m
P14
m
T18
v=2
d=h(power network)
8
The production system Petri sub-net
(yellow)
Places and transitions of the sub-net
manage the parts production and the
quality control recording the production
data and the defective parts.
9
The electric power faults occurrence Petri
sub-net (blue)
Places and transitions of the sub-net
manage the fault types, record the
defective parts and allow the production
system to be activated.
10
To be done
Model to valuate the operative
performances on the basis of Petri net
results
Model the impacts of electric power
supply on transportation system for
deliveries.
-
-
Quality control
effectiveness
Not
detected
wastes
+
+
+
Non quality of
electric power
supply
Defectiv
e parts
+
Machinetool
stoppages
+ Detecte
d wastes
Saturation of the
logisticproduction
system
+
Service
level
-
+
+ Actual lead +
time
+
+ Parts to be
reworked
+
+ Productio
n costs
+
+
On
time
delivery
Prices
11