Free Business Process Simulation Modeling Service

Business Process Modeling Example - Multiplication of tasks

When modeling business processes, there are often situations when the correct modeling options are either unknown or there are several, and only one of them needs to be selected. In this article we'll look at one process and various versions of its execution and modeling in the BP Simulator service.

Modeling of the basic procedure for the analysis of biomaterial

As a demonstration process, let's take a simplified procedure for analyzing the biomaterial in a medical laboratory. For the analysis result the patient must give blood, and the Laboratory of conduct its analysis and inform the patient. We simulate this procedure by placing the following objects of the business process model on the model:

Business process modeling example - Analysis of biomaterial №1
Example of business process modeling - Analysis of biomaterial

Version #1: 1 client and 2 required parallel tasks

Let's consider the possibility of modeling such cases when the process instance is one (one client launched one process), and there are several parallel tasks to complete the procedure. For example, a patient needs to make two different blood tests. We will not consider the variant with sequential fence and analysis in this article, although this can often be a good variant of modeling, but in this case we add a new condition that affects the duration of the function:

Rename an analysis function and add to the model another similar function "Blood test №2", running them in parallel immediately after blood collection. One tube with biomaterial is placed in one apparatus, with a duration of 1 hour, and the second tube in the second one.

Business process modeling example - Analysis of biomaterial №2
Example of modeling 1 client and 2 parallel tasks with a distribution rule AND

The advantages at the input of the "Patient notification" function mean that the function should wait for the results of both analyzes, and not send a new notification each time with the result. Learn more about the Rule distribution of tasks from suppliers.

Version #2: 1 client and 2 excluding parallel tasks

Now consider an example where the patient needs to do not two analyzes, but only one of them. Let's change the Rule distribution of tasks to consumer of the "Biomaterial sampling" function on OR with a 50% probability. This means that the patient with the same probability will be made either by Analysis No.1 or Analysis No.2.

Business process modeling example - Analysis of biomaterial №3
Example of modeling 1 client and 2 parallel tasks with exclusive-OR allocation rule (XOR)

Version #3: 1 client and 2 non-exclusive parallel tasks

And how to simulate the option, when the doctor can prescribe analyzes # 1 and # 2 with independent probability relative to each other? This distribution rule is called non-exclusive OR and is not implemented by the service functionality. But you can implement the OR gate with a combination of XOR rules and an additional model object, as shown in the following figure.

Business process modeling example - Analysis of biomaterial №4
Example of modeling 1 client and 2 parallel tasks with a non-exclusive OR

Here, as an unused route recipient, an object of the Checkpoint type is used, but any of the objects involved in routing, for example an Event can be applied.

Version #4: compliance with EPC notation

Let's bring this model, corrected for simulation, to the notation of EPC business process modeling. For this you need to add:

Business process modeling example - Analysis of biomaterial №5
The final model of the procedure for analyzing the biomaterial in EPC notation