Ortems SolutionUpdate HowTo Business
Our purpose here is not to explain how to configure tools and discrete or continuous parameters but to explain how to use the new customization abilities. This advanced customization was delivered with DELMIA Ortems release 2020 Refresh1 (Fix 1947).
What’s new on Setup time side?
Previously in Ortems | Presently in Ortems |
Only 1 setting at Machine level. On the following screen-shot, on MACHINE_61, the rule is Maximum of all times (Tools, Discrete parameters and Continuous parameters): | More detailed customization at Machine level. As long as “Discrete parameters” and “Continuous parameters” rules are set to “Standard rule”, it runs as previously. The following screen-shot offers the same behavior as the screen-shot on the left. Note #2: as only one tool can be assigned to an operation, there is no need to offer a formula for Tools. |
Reminder about Ortems changeover and setup times
3 source types may generate a setup time:
- Type #1 = The tool here is the tool, assigned at operation level, needed to make the machine able to process the operation. Ortems calculates the tool changeover time required to process the next operation after processing the previous one.
- Type #2 = Setup time related to one or several discrete parameters. Each individual parameter may model a tool, a setup of the machine, etc. The question when several individual parameters are managed is how they have to be taken into account one toward each others? According to the ability to perform these individual actions at the same time (for example several operators working on independent settings) or one after each other (for example, the same operator performs all the actions), the resulting setup time for all these actions is the maximum value among the individual values, or the sum of the individual values. Now Ortems offers the ability to define a formula combining individual setup times for example to sum the time for 2 parameters and use a max formula with a 3rd parameter.
- Type #3 = The same behavior is offered for continuous parameters.
These rules (custom formula) concerning Type#2 ad #3 are attached to each machine.
It is, as previously, mandatory to define how the global setup time is calculated: it is whether the sum of these 3 times, whether the maximum value among these 3 times.
Let’s illustrate the behavior with an example
Our environment is set with
- 4 discrete parameters: COLOR, BRAND, FLAVOR and SPICE
- 3 continuous parameters: DIAMETER, LENGTH and THICKNESS
- Tools: let’s suppose each operation requires its own tool to be processed.
Discrete parameters:
Due to the machine configuration, it is not possible to setup COLOR and BRAND at the same time (BRAND can be changed only once COLOR is changed). Then these setups cannot be performed in parallel. For them the function to use is SUM.
On the opposite, FLAVOR and SPICE can be setup in parallel. Therefore the rule for them is MAX(FLAVOR;SPICE).
But FLAVOR and SPICE setups cannot start before the end of COLOR and BRAND setups.
That’s why the global setup time is the SUM between COLOR & BRAND and FLAVOR & SPICE.
As a conclusion, the rule for all discrete parameters is: SUM(COLOR;BRAND;MAX(FLAVOR;SPICE))
Continuous parameters:
On this machine, THICKNESS can be setup only once DIAMETER is setup. As a consequence, it is not possible to perform them in parallel. Therefore the setup time for both parameters is SUM(DIAMETER;THICKNESS). But another operator can manage LENGTH setup on the same time. That means this LENGTH setup is performed concurrently with the other operator’s one (DIAMETER and THICKNESS setups).
Therefore the rule is MAX(operator#1’s setup ; operator#2’s setup).
The custom rule is then : MAX(SUM(DIAMETER;THICKNESS);LENGTH)
Tools:
Ortems calculates as previously the tool changeover time (required to process the next operation after processing the previous one).
The configuration to model these rules is as follows:
