I am looking to restart the uptime after creating a timetable, aiming to acquire a new sample. Specifically, I'm simulating the replacement of a machine component during scheduled maintenance. I'm unsure how to proceed with this. Any assistance you can provide would be greatly appreciated.
Attached is the desired simulation in an image.
You could in theory remove the pending breakdown event from the event list. But I don't know if, and if so how, it would be possible to 'restart' the MTBF.
Instead I's suggest to use a Tracked Variable label to build custom logic that replaces the default MTBF/MTTR.
In the attached model, an Object Process Flow listens for state changes of the processor. While it is processing, it sets the rate of the TR to 1 (you can of course customize in which states the TR counts up). A different source reacts to the TR reaching a certain threshold and causes a breakdown when this occurs.
The down and up function of the maintenance time table reset the rate and value of the TR back to 0 respectively, so the 'timer' starts over.
@Felix Möhlmann , thank you very much for helping me with the model. I have two questions.
1. Can I make the label behave like a statistical distribution and reset it to get a sample for the breakdown?
2. Can I add the on break down and repair options to the process flow since I use them to perform calculations in the simulation. I don't have much knowledge with process flow, it is really very useful.
1. To use a statistical distibution, use a Wait for Event instead of an Event-Triggered Source. You can then determine a new threshold every time before the token enters the activity.
In the Time Table function you can use code to move the token to the needed activity to re-evaluate the up time.
2. You can generally write any code you want in a Custom Code activity in Process Flow. The only thing you need to be aware of is that you might need to provide certain references/variables that are part of the header in the On Break Down/On Repair fields. Likely the only one you'd need is the object that is breaking down/being repaired. In the MTBF/MTTR this is accessible as involved. Since we're using an Object Process Flow, you can access it there as current.
Use a unique ID for each call of a stop. Then you can preempt this by a resume. Later if the regular resume call occurs, it does nothing, because it doesn`t find anything to resume anymore.
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