Planning a process plant
with a Flashboard.
Example: Using a Flashboard to Help Crush Nuts for Oil
The
process involves sorting and conditioning the raw nuts,
crushing the nuts,
screening out the solid cake
and filtering the oil through several
stages.
The
problem is that different pieces of equipment have different operating cycles.
If the
cycles are not synchronised vital plant units have to be stopped to wait
for upstream feed or downstream ability to
accept product.
Here is
a suggested approach.
As the
trucks are unloaded the load is tagged and becomes one or more production
batches.
The
person in charge assesses each batch and assigns one of several standard
process plans
depending on the quality.
At this
time the “FlashStrips” are made up for each stage in the process.
The “Flashboard” software can print these
for you. It will calculate the length of each strip.
Then they have to be cut from the page, or
you can use perforated stock.
You
could use 5 strips for each batch:
For
preparation:
|
Batch
0209 Preparation
Grade
A 4000 kg ( 6
hours) >>| |
For
pressing:
|
Batch
0209 Pressing Grade
A 4000 kg (6
hours) >| |
For
store after press
|
Batch
0209 Store
in tank Grade
A 4000 kg (6
hours) >| |
For
primary filter:
|
Batch
0209 Filter Grade
A 1600 kg (6
hours) >| |
For
chilling:
|
Batch
0209 Chill Grade
A 1600 kg (24
hours) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
Q. What is the >>>| at the bottom of the
strip?
A. Start of the following strip. (More later)
You also
need some down time FlashStrips.
eg For
the primary filter:
|
Primary
Filter Clean
Down and Reset (5
hours) |
These
are to be in a different colour.
Then set
up your board...
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Resource |
am 6 |
8 |
10 |
12 |
pm 2 |
4 |
6 |
8 |
10 |
12 |
am 2 |
4 |
6 |
8 |
10 |
12 |
pm 2 |
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Preparation |
0209 |
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Press
& screen |
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0209 |
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Tank 1 |
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0209 |
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Tank 2 |
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Primary
Filter |
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0209 |
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Clean |
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Chiller
1 |
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0209 |
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Chiller
2 |
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Chiller
3 |
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Chiller
4 |
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Chiller
5 |
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This is
a simplified diagram of the graphic approach using a loading board.
We
cannot show you the detail here, but, because the approach is so instinctive,
you can be confident that it will work, provided some basic rules are followed.
These rules are detailed in the FlashBoard handbook. Here is a summary:
1. The
board is there to support your planning discussions. If you don’t have a
“stand-up meeting” in front of the board at least once a day, then it’s a waste
of time.
2. The
board has to be visible to all the key players in the plant. Don’t hide it away
in someone’s private office.
3. You
have to have a process to get work off the board. Make board
accuracy one person’s strict responsibility.
4.
Colour is good.
5. If
you have a computer planning system, then drive it from the Flashboard. You use
the scanner for this. Don’t let a computer system be a separate power in the
works.