Constraints

On this screen, the user will define the rate limit and interrupts for each constraint in the model.

The Constraint node represents a step in a manufacturing process that has a throughput rate and the possibility of interrupts.

Constraint Icon

The Constraint node can:

• Represent a Machine, System, Sub-component

• Process material based on rate per time unit

• Experience Interrupts - random, wearout and re-supply, etc

When the machine is running it tracks material production, but there are several things that can happen to stop the flow of production:

• Machine Failure

• Scheduled Event

• Operational Decision

In real systems this data is collected and stored as stops data in a Line Event Data System (LEDS). This data is often referred to as LEDS Data.

In Wishbone, another ChiAha software, we can transform the LEDS Data from Stops into Interrupts. The Interrupts model the underlying distributions for time to failure and time to repair (TTF/TTR).