6.1.1.2. In-process inventory. Fig. 7 shows that the in-
process inventory level increases with an increasing kanban size. Since the processing time
is longer for a large kanban size, so the time for the batch to stay within the system will also be
longer. In addition, the time for each station to serve a full container becomes longer, so at the
end of each data collection period it is easy to find a large percentage of the input material
still working in process.
6.1.1.3. Manufacturing lead time. The average manufacturing lead time (see Fig. 8) behaves
quite similar to the in- process inventory. Theoretically, no matter how large or how small is the
kanban size, the available time for production is the same, because the machine set-up time is not
significant in the case of single product manufacture. However, practically, a small kanban size
allows the system to move the WIP faster between machines. Consequently, finished goods are
available in the form of small batches within a short time. On the other
hand, a large kanban size requires a longer manufacturing
time, and hence delays the output of the finished goods as
compared to a small kanban size at the same demand level.
6.1.1.2. In-process inventory. Fig. 7 shows that the in-process inventory level increases with an increasing kanban size. Since the processing time is longer for a large kanban size, so the time for the batch to stay within the system will also be longer. In addition, the time for each station to serve a full container becomes longer, so at the end of each data collection period it is easy to find a large percentage of the input material still working in process.6.1.1.3. Manufacturing lead time. The average manufacturing lead time (see Fig. 8) behaves quite similar to the in- process inventory. Theoretically, no matter how large or how small is the kanban size, the available time for production is the same, because the machine set-up time is not significant in the case of single product manufacture. However, practically, a small kanban size allows the system to move the WIP faster between machines. Consequently, finished goods are available in the form of small batches within a short time. On the otherhand, a large kanban size requires a longer manufacturing time, and hence delays the output of the finished goods ascompared to a small kanban size at the same demand level.
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