You can run multiple workflow nodes at the same time in parallel as soon as the dependencies are met. Unlike sequential workflows where you need to specify a first step to start the workflow, in parallel workflows all nodes that have no dependencies will start executing simultaneously. When you open the workflow in the Workflow editor make sure that the Workflow type is set to Parallel. Otherwise, the workflow editor will only allow you to design a sequential workflow.

In parallel workflows, the behavior of ok, nok, and ok/nok is as follows

• ok (green) defines the success path.

  This is treated as an AND condition whereby all the dependent nodes should execute and pass. for the downstream dependencies to run. For example, if there are Node1, Node2, and Node3 with ok edges converging to Node4, then all three nodes must complete successfully for Node4 to start executing.

• not ok (red) defines the failure path.

  This is treated as an ANY or OR condition whereby if any of the dependent nodes fails the subsequent node will execute. Note that the workflow process will wait for the completion of all the nodes, and then run the next node. For example, if there are Node1, Node2, and Node3 with nok edges converging to Node4, then if any of the nodes fail Node4 will start executing.

• ok/not ok (black) defines a path that is followed on success or failure.

  This is treated as an unconditional path whereby irrespective of whether the execution succeeded or failed, the next step should execute. If a workflow has multiple ok and ok/nok nodes, the workflow process will wait for all the nodes to complete before executing the next steps.

Workflow design choices that are valid are as follows:

• Multiple nodes as entry points in a workflow.
• Multiple outgoing and multiple incoming ok on the same node.
• Multiple outgoing and multiple incoming nok on the same node.
• Multiple incoming ok and ok/nok on the same node.

Here is an example of a workflow with multiple ok and nok nodes:

Workflow design choices that are not valid are as follows:

• You cannot have disconnected nodes. All nodes must be part of the flow.
• You cannot have closed loops.
• ok and nok cannot converge simultaneously to the same node.
• ok/nok and nok cannot converge simultaneously to the same node.