Simulation

Microstat uses a discrete-event simulation (DES) engine written in Rust to simulate how work items flow through your process model.

Running a simulation

1. Open a scenario in the canvas editor.
2. Click Run in the header.
3. Choose simulation parameters:
   • Mode: simulate until a certain number of units complete (units) or until a time limit is reached (time).
   • Value: the target unit count or time limit.
   • Time unit: min, hr, day, etc.
   • Reps: number of independent simulation runs (more reps = more stable statistics).
4. Click Run. Results appear in the results panel.

Distributions

Set the service time distribution for each Task node, and the arrival distribution for the Start node, in the simulation panel (click the sim icon on a node, or press I).

Distribution	Parameters	Example use
constant	value	Fixed processing time (e.g. always 5 min)
normal	mean, std	Normally distributed service time
exponential	rate	Memoryless arrivals (classic queuing)
uniform	low, high	Any value equally likely in a range
poisson	rate	Count-based arrival process
lognormal	mean, sigma	Right-skewed service times
gamma	shape, scale	Flexible positive-value distribution
weibull	scale, shape	Wear-out or reliability modeling
triangular	low, mode, high	Three-point estimate

Output metrics

After each run, Microstat reports:

Metric	Description
Units completed	Total work items that reached an End node
Throughput	Units completed per time unit
Avg cycle time	Mean time from arrival to completion
Avg queue depth	Mean number of items waiting at each Queue node
Avg resource utilization	Fraction of time each resource was in use

When you run multiple reps, results are averaged across reps. Individual rep results are also available.

Resources

Resources model shared constraints — a person, machine, or license that can only be used by one task at a time (or a limited number).

Add resources in Manage Resources (M), then assign them to Task nodes via the node's resource panel. A task will block until the required resource is available.

See Resources for details.