MODELLING FLEXIBLE MANUFACTURING SYSTEMS - Modelling with Generalised Stochastic Petri Nets - page 181

BB i

K i

idleM i

IB i busyM i OB i

enterCell i inM i outM i exitCell i

repair i

OK i FAILED i

failure i

Figure 8.4: Model of a Kanban cell that can fail

Throughput

Failure
free system

3.00

Relative Throughput
Reduction

2.80

0.040

Failure
prone system

2.60

0.038

2.40 Failure in

middle cell

0.036

2.20

0.034

2.00

0.032

Failure in
last cell

0.030

1.80

0.028

1.60

1 2 3 4 5 6 K

1 2 3

K

Figure 8.6: Throughput comparison
between a middle failing cell and a
final failing cell (percentage reduc-
tion), as a function of the number of
cards

Figure 8.5: Throughput comparison
between a failure free system and a
system in which all cells can fail, as a
function of the number of cards