https://community.appian.com/discussions/f/best-practices/38972/event-driven-vs-task-id-based-integration-between-appian-and-external-systemsHi everyone, We&#39;re building a bi-directional integration between Appian (BPM) and an external multi channels systems CRM, Mobile, Kiosk, Corebank etc. We have two architectural approaches and are looking for insights or best practices from the communityen-USTelligent Community 12https://community.appian.com/thread/150107?ContentTypeID=1Sat, 19 Jul 2025 12:29:28 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:414f0d91-eb41-42ce-9be0-4f80d0d292b3Mathieu Drouin<p>Do not use a task ID based approach for this.</p> <p>Approach 2 is the way to go.</p><div style="clear:both;"></div>https://community.appian.com/thread/150099?ContentTypeID=1Fri, 18 Jul 2025 20:39:52 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:2b39d77a-c5e4-4419-a160-0d22b8df3e08kapilsharma<p>hi&nbsp;<a href="/members/ahmadb3492">ahmadb3492</a>&nbsp;,&nbsp;<br />There isn&#39;t any specific documentation about best practises for choosing task-based or event driven integrations, but I can help you in deciding which approach might be more beneficial based on the use case by highlighting the pros &amp; cons of both the approaches.<br /><br /><br /></p> <table> <thead class="bg-offset"> <tr> <th class="border-borderMain px-sm py-sm dark:border-borderMainDark break-normal border text-left align-top">Approach</th> <th class="border-borderMain px-sm py-sm dark:border-borderMainDark break-normal border text-left align-top">Pros</th> <th class="border-borderMain px-sm py-sm dark:border-borderMainDark break-normal border text-left align-top">Cons</th> </tr> </thead> <tbody> <tr> <td>Task-ID Driven</td> <td>Simple for basic use; direct task control</td> <td>Tightly coupled, fragile to changes, less scalable</td> </tr> <tr> <td>Event-Driven&nbsp;</td> <td>Decoupled, scalable, supports async/multi-party flows</td> <td>More upfront design/DB mapping work; new modeling needed</td> </tr> </tbody> </table><div style="clear:both;"></div>