Describing Flow as a strict superset means everything Workflow Rules and Process Builder are capable of doing, Flow can also do, while Flow additionally supports significant capabilities neither older tool ever had, such as Loops and Collection Variables for processing multiple records, Subflows for genuine reusability, Fault Paths for graceful error handling, and Scheduled Paths for time-relative actions. This is a meaningfully different claim than simply calling Flow "an alternative" or "a newer option," because it means there is no genuine capability trade-off in choosing Flow — an Admin migrating from either legacy tool to Flow is not sacrificing any functionality, they are strictly gaining additional capability while retaining everything the original automation could already do. This strict superset relationship is precisely why Salesforce felt confident fully retiring new creation of both older tools rather than maintaining three parallel tools with genuinely different, non-overlapping capability sets.

They might be missing active Workflow Rules or Process Builder processes on that same object, because Flow Trigger Explorer is specifically and exclusively scoped to Record-Triggered FLOWS — it does not display or account for legacy automation built with either older tool, even if that legacy automation is fully active and genuinely affecting the object's behavior. An Admin relying solely on Flow Trigger Explorer, reasonably assuming it represents the complete automation picture for an object, would have no visibility into a Workflow Rule that has been quietly running for years, or a Process Builder process built by a previous Admin, both of which could be actively modifying the same fields the newer Flows are working with, potentially creating exactly the kind of silent, hard-to-diagnose interaction conflicts covered in this module. The correct practice is checking all three separate locations — Workflow Rules, Process Builder, and Flow Trigger Explorer — to get the genuinely complete automation picture for any object in an established org.

The Migrate to Flow tool analyzes an existing Workflow Rule or Process Builder process and automatically generates a new Flow attempting to replicate the same underlying logic and actions, significantly reducing the manual effort compared to rebuilding the automation entirely from scratch by hand. Manual review remains genuinely required afterward because automated translation between two structurally different tools cannot always perfectly capture every nuance of the original logic — subtle behavioral differences, edge cases in how conditions were originally evaluated, or assumptions baked into the original automation's design may not translate with perfect fidelity into the generated Flow, meaning the output should be treated as a strong, time-saving starting point rather than a guaranteed, ready-to-activate final result. Responsible practice is to carefully compare the generated Flow's actual logic against the original automation's real configuration, and thoroughly test the new Flow's behavior directly against the original before ever deactivating the source automation.

Migrating items piecemeal, discovering additional legacy Workflow Rules or Process Builder processes only as they are stumbled upon mid-project, creates genuine project risk: the true scope of the migration effort is unknown at the outset, making it difficult to prioritize correctly, estimate effort accurately, or communicate a realistic timeline to stakeholders, and there is a real chance that some piece of business-critical automation goes completely unnoticed until it unexpectedly stops functioning correctly, at which point the cause may not be immediately obvious. A complete upfront audit, inventorying every Workflow Rule and Process Builder process across every object along with a summary of what each one does, gives the Admin genuine visibility into the full scope of work before any changes begin, allowing informed prioritization — starting with simpler, lower-risk automation to build process confidence before tackling complex, business-critical logic — and providing a clear, trackable record of progress as each item is successfully migrated and deactivated.

It is not necessarily an immediate functional problem if both are currently setting the identical value under genuinely identical conditions, since the end result on the record would be the same either way, but this redundancy still creates real risk going forward rather than being genuinely harmless. First, running duplicate logic wastes processing overhead unnecessarily, since the same outcome is being computed and applied twice rather than once. Second, and more importantly, if either the Workflow Rule or the Flow is later modified by an Admin who is unaware the other one also exists and does something similar, the two pieces of automation can silently drift out of agreement and begin producing genuinely CONFLICTING results, with no obvious warning that this has happened, since both are still technically "working" from their own isolated perspective. Third, this redundancy makes the object's true automation behavior significantly harder for the next Admin to understand and maintain confidently, since they must now account for two separate, potentially overlapping sources of the same logic rather than one clear, authoritative source.

The sequence begins with the Workflow Rule already having been identified during a broader audit and inventory of all legacy automation across the org, giving it a documented place in a prioritized migration plan rather than being addressed in isolation. Next, the Admin uses the Migrate to Flow tool against this specific Workflow Rule, generating an initial Flow attempting to replicate its logic, and then carefully reviews that generated Flow's actual configuration against the original rule's real criteria and actions to catch any translation nuances the automated tool may have missed. The new Flow is then thoroughly tested in a sandbox environment first, directly comparing its behavior against the original Workflow Rule's known behavior across a range of realistic test scenarios, and where genuinely feasible, both the new Flow and the original rule might run in parallel briefly, with the Admin monitoring for any discrepancy before fully committing to the change. Only once the new Flow's correctness is confirmed in production does the Admin deactivate the original Workflow Rule, and finally updates the migration inventory to reflect this item's completed status, before moving on to the next prioritized item in the broader migration plan.