At its most basic, the Parallel consists of two stage designations. First, we indicate a stage at which the parallel pathways will begin. You can think of the begin stage like the trunk of a tree, with the branching pathways of the parallel splitting from here. Next, we indicate a stage at which the parallels will gather. And that’s it. The real magic is what happens between these two stages, and it can be as simple or as robust as is required. In fact, it’s entirely possible to kick-off another group of parallels within the first group. It’s a little like a set of very efficient Russian nesting dolls.
When adding the Parallel to your workflow, there are two different options. The first is the Basic Parallel, which can best be understood as an “All or Nothing” deal. If you add a Basic Parallel to a stage, all branches of the Parallel will initiate once the begin stage is completed. Once all branches have finished, the gather stage will be initiated. This is a good option for workflows with concurrent signatures, or multiple approvers who need to receive a form at the same time.
Basic Parallel: In this Parallel, both stage 2 and stage 3 will initiate after stage 1 is complete.
The second parallel function is the Conditional Parallel. Like the name indicates, using this parallel will allow you to set up conditions which dictate how many of the possible pathways will initiate once the begin stage is completed. For example, imagine a workflow in which a requester submits a form for approval. After this stage, the form requires approval from up to three different approvers, depending on the choices made within the form. Using the Conditional Parallel allows us to automatically route this form to one, two, or all three approvers, and to continue the workflow at the gather stage once all approval stages are completed.
Conditional Parallel: In this Parallel, it’s possible for either only stage 2, only stage 3, or both stages to initiate after stage 1 is complete.
The Parallel is just one of the many tools available in TAP, and when used in conjunction with other features like custom notifications, conditional rules, and stage roles, it can make tracking those multi pathway workflows a breeze. Robert Frost once wrote about choosing between two diverging paths, but if he had been using TAP, he wouldn’t have had to choose. He could have just used the Parallel.