Start Process

Start process invokes the target process on a separate engine of Appian 

Those are back end architecture of Appian . Appian Engines You want to know more about it go through this link,i suggest you to don't dive too deep into that this early.

These engines work is to store , retrieve real time data.And in general Analytics (which are useful for you to create reports ) & process execution engines comes in pairs.

Seperate engines means

A different engine...

Hi JPotharaju ,

In Appian, Processes will execute on execution engines.

There are 3 execution engines, acts as in-memory database.

Every process take an shared memory to execute, including subprocesses.

In the same memory space, both parent and sub-process will be executed.

But start process will accumulate memory space in one engine and parent process other engine, so the they both are not associated to each other.

I hope this clears your doubt! :)

Please refer following image:

Thank you 

Always, I'm here to learn and share my knowledge.

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what is the differance between asynchronous subprocess and start process

Hello JPotharaju 

I hope this will make you understand.

Comparing ways to start a process from a process

This shows the differences between Synchronous, Asynchronous and Start Process.