DELMIA Ortems - External time that isn’t part of processing the operation on the machine
For your information, you can find the downloadable MS Word version at the end of this post.
1.Time Out Machine (T.O.M)
Description
The "Time out machine before" is the time required by all the actions that take place before the operation starts, and that do not use modeled equipment. For example: part control.
The "Time out of machine after" corresponds to the length of time for which production is not available after the operation. For example: drying time.
- Planning display
| T.O.M Before | T.O.M After |
Conditions to display it: In the Downtimes tab of the chart control ribbon, select T.O.M.
- Where is it set?
- From Data Module>Process>Operations
Where to see it in the Planning program?
- From “Operation description” window > “Op. detail” tab (from a Gantt displaying operations, Right click > Display, then click on an operation > Op. detail)
- From an “Op focus Gantt” chart > Display, Right click on the left margin > Configure > add T.O.M Before & T.O.M After (from a Gantt displaying operations, Right click > Highlighting > WO; Display menu then “Op. focus Gantt chart”)
Possible to modify the value from Planning program? If yes, how?
Yes: from “Operation description” window (see previous point), enter the value on keyboard
Specificity about
In the Data Module, T.O.M values are expressed in Hundredths of an hour.
The machine is not impacted by the T.O.M, meaning that it can process another operation during this time.
But:
- the successor operation of an operation with a T.O.M After cannot start before the end of that T.O.M After.
- the predecessor operation of an operation with a T.O.M Before cannot end after the beginning of that T.O.M Before.
Precedence constraints (From example End-Start link) are a higher constraint which mean they will prevail on the T.O.M.
Behavior during downtimes
- TOM Before:
The ‘TOM before’ symbol displayed on the planning could begin inside a downtime undependably to the constraint configurations.
It can include all or part of the downtime, the symbol displayed and the TOM will remain the same.
- TOM After:
The ‘TOM after’ symbol displayed on the planning could end inside a downtime undependably to the constraint configurations.
It can include all or part of the downtime, the symbol displayed and the TOM will remain the same.
2.Transfer time
Description
The transfer time is the required time to move apart from one plant to another.
You can choose to take these times into consideration in the plan. You can also weight them for their use by the scheduling process, for example to limit movements between plants in case of absolute necessity.
Planning display
Conditions to display it: In the Downtimes tab of the chart control ribbon, select Transf. time.
Where is it set?
- From Data Module > Process > Plants
Then it should be associated with a machine (Data Module > Resources > Machine groupings)
Where to see it in the Planning program?
- From “Operation description” window > “Op. detail” tab (from a Gantt displaying operations, Right click > Display then click on an operation > Op. detail)
Possible to modify the value from Planning program? If yes, how?
No, this value needs to be modified in the Data Module.
Specificity about
You can set a weighting, for example to limit movements between plants to cases of absolute necessity. The higher the weight value, the more the application tries to avoid changing plants during the scheduling process (Positioning criterion: Minimize transfer times between plants)
Behavior during downtimes:
The displayed Transfer Time symbol line on the planning could begin inside a downtime undependably to the constraint configurations.
Whether it include all or part of the downtime, the display of the line and the transfer time will remain the same.
3.Preparation time
Description
Preparation time is an integral part of the operation duration and enlarge its tag.
It is not visible independently in the plan. Also, it does not vary according to the quantity to produce.
Planning display
Where is it set
- From Data Module>Process>Operations: the preparation time and its unit have to be allocated to the operation.
- Where to see it in the Planning program?
- From “Operation description” window > “Operation” tab
- From a Gantt displaying operations window > Display – Right click on the left margin > Configure > Add Preparation time
Possible to modify the value from Planning program? If yes, how?
Yes, directly from any Gantt - From “Operation description” window > “Operation” tab
Specificity about:
- It is not visible independently in the plan
Preparation time is added to the process duration of the operation
Example
Consider an operation:
For WO 016 Phase 029:
We would like to verify the Duration. How is it calculated?
Duration = Preparation + ((Quantity / RUC * ‘Duration / RUC’) = 150 + (400/400 *100) = 150+100 = 250
Behavior during downtimes:
The operations having preparation time can include a downtime no matters the constraints chosen, in that case, the symbol length will increase but the operation duration remains the same.
4.Setup time
Description
The setup time, or changeover time, is the required time to change from one tool or parameter to another between two successive operations on the same machine.
This time can be:
Fixed, whatever the machine and required change.
When the time required to set up a tool does not change depending on the tool used before or next, you set it in the operation management module, for every operation requiring that tool.
Variable, depending on the current tool/parameter, and the new tool/parameter required.
When changeover times vary depending on the tool to remove and the tool install, you have to create a matrix of those tool combinations. You can generate a matrix of all combinations or create the combinations one by one.
- Planning display
Changeover time color: case “Op color” |
Changeover time color: case “Fixed color” |
The setup time color depends on Options>Configuration>Display “Changeover Times” field from Planning program.
Choose the color for changeover times in Gantt charts - either the same color as the operation they are associated with (this is the default value), or gray.
Where is it set
- From Data Module>Setup Time>Simple
- From Data Module>Setup Time>Discrete parameters
- From Data Module>Setup Time>Continuous parameters
Where to see it in the Planning program?
- From “Operation description” window > “Op. detail” tab
(From a Gantt displaying operations, Right click > Display; click on an operation > Op. detail)
- From any Gantt click on the changeover symbol itself
- From a Gantt displaying operations window > Display – Right click on the left margin > Configure > Add Changeover time
- Possible to modify the value from Planning program? If yes, how?
No, this value has to be modified on the Data Module.
- Specificity about
The tool changeover time is handled for operation even with no tool
Behavior during downtimes:
Several parameters may impact the setup time behavior.
The Setup time length displayed on the planning varies depending on the chosen parameters, but the Setup duration always remains the same.
- If Setup can be performed during machine downtime, therefore “Background setup” option has to be activated. The Setup length corresponds to the Setup duration.
- If Setup cannot be performed during machine downtimes, option “Background setup” has to be disactivated. The Setup length is enlarged by the downtime duration.
- If Setup can be interrupted by machine downtimes therefore the “Interruptible tool changeovers” option has to be activated. It allows to start the Setup before the machine downtime and to end it after the machine downtime.
- If Setup cannot be interrupted by machine downtimes therefore the “Interruptible tool changeovers” option has to be disactivated. The Setup length is enlarged by the downtime duration.
- If Setup can be performed before the end of the same WO operation predecessor, the “Setup smoothing” option has to be activated.
Constraint Y/N | Display | |
Background Setup | ||
| Setup Smoothing | ||
| Interruptible tool changeovers | ||
To summarize
| Name | Planning display
(Display condition) | Where to Set | Option to activate? | Editable from Planning | Downtime behavior |
Time out Machine: Before
After |
(Downtimes> T.O.M) | Data Module & Planning | None | Yes | No impact |
Transfer time
| (Downtimes>Transf.time) | Data Module | Constraint configuration > Transfer time | No | No impact |
Setup time Operation color
Fixed color |
| Data Module | Constraint configuration > Setup time | No | Parameter dependent: See table above |
| Preparation time | Data Module & Planning | None | Yes | No impact |
You can download the doc version here:
