Operation materials
Operation materials are used to model the consumption and production of material by operations.
If an operation Op is consuming 2 units of part A and 1 unit of part B to produce 3 units of part C, then this table should contain three records:
operation |
quantity |
item |
type |
|---|---|---|---|
Op |
-2 |
A |
Start |
Op |
-1 |
B |
Start |
Op |
3 |
C |
End |
If the same operation produces 1 units of part C you can leave out the third record. It’s implicitly assumed from the item field in the operation table.
operation |
quantity |
item |
type |
|---|---|---|---|
Op |
-2 |
A |
Start |
Op |
-1 |
B |
Start |
Different types are available:
- start:Consume (or produce) material at the start of a manufacturing order, right after any setup time on the loaded resource has been completed.The quantity consumed or produced is proportional to the quantity of the manufacturing order.
- end:Produce (or consume) material at the end of a manufacturing order.The quantity consumed or produced is proportional to the quantity of the manufacturing order.
- transfer_batch:Consume (or produce) material in a number of batches of fixed size at various moments during the total duration of the manufacturing order (not including the setup time on the loaded resource).This feature is deprecated. Use operation dependencies or operation material offsets instead.
Field |
Type |
Description |
|---|---|---|
item |
item |
Material being consumed or produced.
This is a required field.
|
operation |
operation |
Operation to which the material flow is associated.
This is a required field.
|
quantity |
double |
Material quantity being consumed or produced per unit of
the manufacturing order.
Default value is 1.0.
|
quantity_fixed |
double |
Fixed material consumption or production per manufacturing
order, independent of the size of the manufacturing order.
This is useful to model a constant scrap rate for calibration
or testing, modeling a throw-away prodcution tool, etc…
Default value is 0.0.
|
transferbatch |
double |
Batch size by in which material is produced or consumed.
Only relevant for flows of type batch_transfer.
The default value is null, in which case we default to
produce at the end when the quantity is positive, or
consume at the start when the quantity is negative.
To protect against a big impact on performance and
memory footprint we limit the number of material transfer
batches to 50 per manufacturing order.
This field is deprecated.
|
offset |
duration |
Time offset relative to the start or end date of the manufacturing
order for the material production or consumption.
Eg offset is 1 day for a flow of type ‘end’
-> Material is produced 1 day after the end of the manufacturing order
-> This can be used to model a cooldown, drying or testing time.
Eg offset is -1 day for a flow of type ‘start’
-> Material is consumed 1 day before the start of the manufacturing order
-> This can be used to model a material preparation or picking time.
|
effective_start |
dateTime |
Date after which the material consumption is valid.
Before this date the planned quantity is always 0.
|
effective_end |
dateTime |
Date at which the material consumption becomes invalid.
After this date (and also at the exact date) the planned
quantity is always 0.
|
priority |
integer |
Priority of the flow, used in case of alternate flows.
The default is 1.
Lower numbers indicate more preferred flows.
|
name |
non-empty string |
Optional name of the flow.
All flows with the same name are considered to be
alternates of each other.
|
search |
string |
Defines the order of preference among the alternate flows.
The valid choices are:
|