{"id":792,"date":"2023-09-26T13:08:00","date_gmt":"2023-09-26T11:08:00","guid":{"rendered":"https:\/\/itsonix.laolaweb.com\/?p=792"},"modified":"2026-05-13T13:10:29","modified_gmt":"2026-05-13T11:10:29","slug":"bpmn","status":"publish","type":"post","link":"https:\/\/itsonix.eu\/en\/blog\/bpmn\/","title":{"rendered":"BPMN"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Some of our customers operate in a process-driven manner. These processes must be reflected in the software. Projects often become unnecessarily complicated or drag on because the business department and IT speak different languages. How can collaboration succeed when both the business department and IT share the same understanding of the problem?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To ensure that business logic processes can be optimally implemented in the software application, a common language is needed. Over the years, BPMN (Business Process Model and Notation) has proven to be an ideal tool for our projects with clients whose structure is heavily process-driven. BPMN provides a common language and a visual approach for describing, analyzing, and optimizing business processes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is BPMN?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BPMN is a standard for modeling business processes. An important aspect of BPMN is that models can be represented graphically. This visualization helps to better understand the processes themselves, to communicate with relevant stakeholders, and to optimize workflows.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The basic elements of the standard include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Events (e.g., the receipt of an email)<\/li>\n\n\n\n<li>automated tasks (e.g., entering data into an internal system)<\/li>\n\n\n\n<li>Manual tasks (e.g., making decisions)<\/li>\n\n\n\n<li>Gateways (Splitting the Program Flow)<\/li>\n\n\n\n<li>Connectors (linking other BPMN elements)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Case Study: The Hiring Process<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To illustrate the benefits of working with a structured process, we\u2019ve developed a simple case study: A company wants to use an IT system to manage initial contact with job applicants. Typically, the HR department would coordinate requirements with the development department and commission the implementation. In doing so, a shared understanding of the application process must be established. A requirements document is likely to be interpreted slightly differently by everyone involved, and it is questionable whether the implementation will actually meet the real requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">BPMN as a Requirements Specification<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BPMN can help here by creating a central document for requirements and implementation. It is explicitly intended not only for documentation but can also serve as the basis for concrete implementation through the use of a process engine.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"445\" src=\"https:\/\/test.itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch-1024x445.jpg\" alt=\"\" class=\"wp-image-795\" title=\"Application Process_German\" srcset=\"https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch-1024x445.jpg 1024w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch-300x130.jpg 300w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch-768x334.jpg 768w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch-1536x668.jpg 1536w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/Bewerbendenprozess_deutsch.jpg 1840w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Even this simple example shows that, even without specific knowledge of the standard\u2019s details, it is clear how the process works in principle. Furthermore, all stakeholders (HR, project management, product owners, designers, developers, etc.) can refine and improve the process through ongoing collaboration. BPMN-driven work thus complements the agile methodologies we practice perfectly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The diagram above uses the following BPMN 2.0 elements:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Element<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Start Event<\/td><td class=\"has-text-align-left\" data-align=\"left\">A process is initiated for this event. As soon as a process is initiated, an instance of the process is technically created. This instance then contains the current processing status, all associated data, and additional information.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Connectors<\/td><td class=\"has-text-align-left\" data-align=\"left\">Connectors control the flow of control and define the next BPMN elements to be processed after the current element has been processed<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Activity<\/td><td class=\"has-text-align-left\" data-align=\"left\">Activities or tasks are all the things that must be done during a process (manually or automatically). This may involve interacting with external systems or manipulating data.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Gateways<\/td><td class=\"has-text-align-left\" data-align=\"left\">Gateways break down the control flow and use the available data to determine which elements are executed next<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">End Event<\/td><td class=\"has-text-align-left\" data-align=\"left\">As soon as an end event is reached, processing of the current process instance is completed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In addition, there are a variety of other elements that support fine-grained modeling of all kinds of processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A more detailed specification of the elements can be found in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.omg.org\/spec\/BPMN\/2.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.omg.org\/spec\/BPMN\/2.0\/<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/de.wikipedia.org\/wiki\/Business_Process_Model_and_Notation\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/de.wikipedia.org\/wiki\/Business_Process_Model_and_Notation<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">BPMN as the Basis for Implementation (Camunda)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As mentioned above, the diagram created is not only a specification but also serves as the direct basis for technical implementation. In BPMN-driven software implementations, a so-called process engine is now required. There are a number of these available for various purposes. In our projects, we have had the best results with <a href=\"https:\/\/camunda.com\/de\/\">Camunda<\/a> Camunda has a large community, is a mature software product, and can still be used for free. In addition, it offers various on-premises and cloud solutions. We are currently using Camunda 7 as an on-premises solution in conjunction with Java and Spring Boot.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Architecture<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A major advantage of the BPMN implementation solution with a process engine is that the architectural decisions are relatively straightforward. It makes sense to create a separate application for each activity (task) and another application for the process engine itself. Thus, the system architecture can be broadly derived from the BPMN process description.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"671\" height=\"301\" src=\"https:\/\/test.itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_architektur_de.png\" alt=\"\" class=\"wp-image-794\" title=\"bpmn_architecture_en\" srcset=\"https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_architektur_de.png 671w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_architektur_de-300x135.png 300w\" sizes=\"(max-width: 671px) 100vw, 671px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">As shown in the figure, a separate service is built for each activity. This service connects automatically to the central process engine via the Camunda libraries. It should be noted, however, that this approach is not strictly necessary. All code could also be placed in a single central service, but this would undermine a major advantage of our architecture. Each individual task handler service is freely scalable. This allows for the development of applications that need to process very large amounts of data. Camunda ensures that only one task (associated with a process instance) is ever forwarded to exactly one service instance. The task handlers periodically poll the process engine for new tasks, and Camunda guarantees exclusive processing. This is therefore a polling mechanism rather than a push mechanism for individual tasks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A task handler processes the given task and reports the response back to the process engine. During processing, the task handler can access variables that were passed at the start event or that are modified or created by other task handlers during the run.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Variables and other data are automatically stored in the database connected to the Process Engine, and this process is completely abstracted from the user's perspective.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Code example showing how a task handler connects to the engine:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"753\" height=\"651\" src=\"https:\/\/test.itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_code.png\" alt=\"\" class=\"wp-image-793\" title=\"bpmn_code\" srcset=\"https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_code.png 753w, https:\/\/itsonix.eu\/wp-content\/uploads\/2026\/05\/bpmn_code-300x259.png 300w\" sizes=\"(max-width: 753px) 100vw, 753px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The included libraries make it easy to implement the respective task handlers, since they automatically handle all the logic required for connecting to the process engine. In addition, many parameters can be configured, such as polling or lock intervals, which define the maximum processing time.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages of this approach<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As mentioned earlier, using BPMN as a requirements specification offers a number of advantages, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved understanding of the process: The visual model helps everyone involved get a clear picture of the process.<\/li>\n\n\n\n<li>Improved Communication: The model can be used as a communication tool among the various stakeholders.<\/li>\n\n\n\n<li>Easier Implementation: The model can be used as the basis for the actual implementation of the process. In addition, Camunda can also be used as software-as-a-service, eliminating the need for additional effort related to data management and process engine setup.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Restrictions<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use for the Right Purpose: BPMN and Camunda are an excellent solution for developing a system based on business processes. This is also reflected in our practical experience working with these systems.<\/li>\n\n\n\n<li>Initial (learning) effort: BPMN and Camunda have a relatively steep learning curve, which could make it difficult for stakeholders to get started and accept the tools. However, there are enough resources available to help solve a wide range of problems.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The use of BPMN simplifies the modeling of an existing business process and is also very useful for developing new processes. The standard serves as both a working tool and documentation, making it a solid foundation for establishing a shared understanding of domain knowledge. Once created, the process serves as a perfect foundation for the technical implementation of that process using process engines such as Camunda. Process modeling, agile development approaches, and a focus on business aspects go hand in hand here to find optimal solutions for different customers and use cases.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ein Teil unserer Kunden arbeitet prozessgetrieben. Diese Prozesse m\u00fcssen in der Software abgebildet sein. Oftmals werden Projekte unn\u00f6tig kompliziert oder in die L\u00e4nge gezogen, da Fachabteilung und IT andere Sprachen sprechen. Wie kann eine Zusammenarbeit gelingen, in der beide \u2013 Fachabteilung und IT \u2013 das gleiche Verst\u00e4ndnis des Problems haben? Damit Prozesse aus der Gesch\u00e4ftslogik [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":796,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-softwareentwicklung"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BPMN - IT Sonix - Ihr Partner f\u00fcr individuelle Softwarel\u00f6sungen<\/title>\n<meta name=\"description\" content=\"it Sonix Blog: BPMN\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itsonix.eu\/en\/blog\/bpmn\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BPMN - 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