AND Gateway - A real life usage of AND gateway.

Question

Hi all, 
 here am looking for a real life use-case for AND gateway. 
 my understanding is AND gateway allows us to execute a specific set of tasks in parallel, so does this means we will have multiple controls running in process model at a given particular time ? Thanks, 
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josep · Accepted Answer

Hello Preji, 
 
To answer your question, yes this allows you to execute multiple tasks in parallel. You don't have to specifically add multiple controls. Depending in your use case you maybe want to kill one of the parallel path before the whole process finishes. What happens is that multiple paths execute in the same instance ( multiple threads). 
 
You should be careful about the variables been used on each path (thread). 
 
There are multiple good reasons to make parallel processing of tasks. 
 
For example: 
* Let say you have en on boarding process which requires approval from multiple areas. So instead of asking for the approvals one after another you can request the approval to all the required areas at the same time. 
* Lets say you have multiple integrations over the night and you have a limited window to execute those integrations. So, you want to be "time efficient" then you want to execute everything in parallel. 
* In the same integration you have to process multiple operations at the same time, each operation requires large amount of time. So, you want to execute all the operation at the same time (Add, update, delete). 
* Lets say you need to send email with the taskid first the task needs to be created before you send the email so you start the task and in parallel after 1 minute timer you query the taskid then you send the email with the taskId. 
 
Sometimes there are other techniques or solutions to the same problem but these are some examples to use the AND. 
 
Let us know if you have some special use case which can be interesting to discuss 
 
Jose

Dastagiri Dudekula · Answer

Preji P (prejip) Following are the detailed usage as per the Appian academy. I hope its visual representation describes is usage with respect to diverge (Fork) and converge (Join).

Mike Schmitt · Answer

antogladvinj3315 said: What is the mistake here 
 most likely your mistake is even having that middle path. you should only have the top path and the bottom path, joined together at a subsequent AND gateway (to ensure both paths are complete) before proceeding on to the Terminate node. 
 Here your middle path is: 
 
 accomplishing nothing, AND 
 causing your issue

aloks0189 · Answer

You can take an example of Employee On-boarding Process, where a candidate will go through various phases of approvals in order to get on-boarded into an organization once after completion of pre-onboarding process. Consider we have following departments: HR, IT and Admin and the candidate's request need to go through all these three levels of approval where workflow for each department can be triggered immediately once after completion of pre-onboarding process, hence we need to trigger all these 3 processes in parallel. But the flow should only terminate when all these 3 departments have completed their work, till that onboarding process will be in-progress and the flow will hold at Joining point (i.e. AND Gateway). Here each department is a separate set of actors who will be working on this flow. In this use case, you can use AND Gateway to split the flow into three path, where each path will trigger a sub-process for their respective department. And we will again join all these 3 flows into a single AND Gateway, this will make sure that, you flow do not proceeds further unless Admin, IT and HR have completed their work/tasks. 
 For more information, please refer to AND Gateway Documentation Hope this helps.

Abhay Dalsaniya · Answer

Use End node instead of Terminate.

AND Gateway - A real life usage of AND gateway.

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