Snapshots and Undo Checkpoints

Before you run an optimization pass, a finite reschedule, or any bulk change you might want to walk back, capture a snapshot: a named checkpoint of the current schedule state, stored separately from your live production data.

Create Snapshot

Capture the current schedule as a named snapshot. Nothing about your live schedule changes when you do — a snapshot is a copy, not a mode switch.

Restore

Roll the schedule back to any saved snapshot in one click. This is the safety net for “that didn’t go the way I expected” — take a snapshot before a large optimizer run or a finite Accept, and if the result isn’t what you wanted, restore it.

Snapshots vs. Undo

These solve two different problems, and it’s worth knowing which one you actually want:

• Undo/Redo (Ctrl+Z / Ctrl+Y) steps backward and forward through your own in-session staged edits — drags, mostly — before you Save. It’s short-range, client-side, and gone once you close the tab or Save. See Drag-and-Drop Rescheduling for how staging and Save actually work.
• Snapshots are a deliberate, named checkpoint of the whole schedule that survives across sessions and across a Save — the tool for “before I run this optimizer pass / this finite reschedule, let me be able to get back to exactly where I am now,” not just “undo my last click.”

A reasonable habit: snapshot before anything you’d call a “run” (a finite Generate, an optimizer pass, a batch of manual changes you’re not fully sure about), and rely on Undo for the small stuff in between.

What a snapshot is not

A snapshot is a single stored state you can return to — it is not a side-by-side comparison of two competing plans, and SmartFlow doesn’t currently let you evaluate a what-if change (an extra shift, an expedited order) against a live baseline before committing to it. If you’re picturing scenario comparison, that’s a different, larger capability — see below.

Concepts behind this feature

For the fuller idea of what a genuine what-if comparison and a capable-to-promise ship-date quote actually require — solving two plans at the same instant, and why a quote is a projection rather than a reservation — see What-If Scheduling and Capable-to-Promise (CTP). For the narrower, related idea of protecting a plan you’ve already committed to, see Plan Stability: Frozen Horizons, Nervousness, and When to Reschedule.