AI and LLMs: Making Business Process Design Talk the Talk Ever tried to explain a complex business process – how a customer order flows from clicking 'buy' to getting a delivery notification – to someone who isn't directly involved? It's tricky! Businesses often use detailed diagrams, called process models, to map these steps out. This helps them work more efficiently, reduce errors, and improve communication. But here's a challenge: creating and updating these diagrams often requires specialized skills in modeling languages like BPMN (Business Process Model and Notation). This creates a communication gap between the "domain experts" (the people who actually do the work and understand the process best) and the "process modelers" (the ones skilled in drawing the diagrams). Constantly translating the domain experts' knowledge into technical diagrams can be a slow and burdensome task, especially when processes need frequent updates due to changes in the business world. Imagine if you could just talk to a computer system, tell it how your process works or how you want to change it, and it would automatically create or update the diagram for you. This is the idea behind conversational process modeling (CPM). Talking to Your Process Model: The Power of LLMs Recent advancements in artificial intelligence, particularly with Large Language Models (LLMs), are making this idea more feasible. These powerful AI models can understand and generate human-like text, opening up the possibility of interacting with business process management systems using natural language. This research explores a specific area of CPM called conversational process model redesign (CPD). The goal is to see if LLMs can help domain experts easily modify existing process models through iterative conversations. Think of it as having an AI assistant that understands your requests to change a process diagram. How Does Conversational Redesign Work with AI? The proposed CPD approach takes a process model and a redesign request from a user in natural language. Instead of the LLM just guessing how to make the change, the system uses a structured, multi-step approach based on established "process change patterns" from existing research. Here's the simplified breakdown: Identify the Pattern: The AI (the LLM) first tries to figure out which standard "change pattern" the user's request corresponds to. Change patterns are like predefined ways to modify a process model, such as inserting a new step, deleting a step, or adding a loop. They simplify complex changes into understandable actions. Derive the Meaning: If a pattern is identified, the LLM then clarifies the specific details (the "meaning") of the change based on the user's wording. For example, if the pattern is "insert task," the meaning would specify which task to insert and where. Apply the Change: Finally, the AI system applies the derived meaning (the specific, parameterized change pattern) to the existing process model to create the redesigned version. This multi-step process, leveraging the LLM's understanding of language and predefined patterns, aims to make changes explainable and reproducible. The researchers also identified and proposed several new patterns specifically needed for interacting with process models through conversation, like splitting a single task into multiple tasks or merging several tasks into one. Testing the AI: What Did They Find? To see how well this approach works and how users interact with it, the researchers conducted an extensive evaluation. They asked 64 people with varying modeling skills to describe how they would transform an initial process model into a target model using natural language, as if talking to an AI chatbot. The researchers then tested these user requests with different LLMs (specifically, gpt-4o, gemini-1.5-pro, and mistral-large-latest) to see if the AI could correctly understand, identify, and apply the intended changes. The results offered valuable